an

, the n^{\text{th}}n
th
term of the sequence 17, 15, 13, 11, ...17,15,13,11

Answers

Answer 1

Therefore, the n-th term of the sequence is 19 - 2n.

What is arithmetic sequence?

An arithmetic sequence is a sequence of numbers in which each term after the first is obtained by adding a constant value to the previous term. This constant value is called the common difference of the arithmetic sequence. For example, the sequence 2, 5, 8, 11, 14, ... is an arithmetic sequence with a common difference of 3, since each term after the first is obtained by adding 3 to the previous term.

The nth term of an arithmetic sequence can be expressed using the following formula:

an = a1 + (n - 1)d

where an is the nth term of the sequence, a1 is the first term, n is the number of the term, and d is the common difference.

The sum of the first n terms of an arithmetic sequence can also be calculated using the formula:

Sn = n/2(2a1 + (n - 1)d)

where Sn is the sum of the first n terms, a1 is the first term, n is the number of terms, and d is the common difference.

Here,

The first term of the sequence is 17 and the common difference between consecutive terms is -2 (i.e. subtracting 2 from the previous term to get the next term). So, we can write the n-th term of the sequence as:

a_n = 17 + (n-1)(-2)

Simplifying this expression, we get:

a_n = 19 - 2n

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Related Questions

What is the conversion of 5.5 inches to mm?

Answers

The value of "5.5 inches" after conversion to millimeter is equivalent to 139.7mm .

To convert the number 5.5 inches to millimeters, we use the conversion factor ;

The Conversion Factor is defined as a mathematical ratio which is used to convert a measurement from one unit to another unit .

We know that  1 inch is approximately equal to 25.4 millimeters,

So , the conversion factor is 25.4 mm ;

On multiplication , we get ;

⇒ 5.5 inches × 25.4 millimeters/inch = 139.7 millimeters .

Therefore, 5.5 inches is equal to 139.7 millimeters .

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What is the conversion of 63 f to c?

Answers

The conversion of 63 f to c is equivalent to approximately 17.22°C .

For 63 (degrees) Fahrenheit we write 63 °F, and (degrees) Celsius or centigrades are denoted with the symbol °C.

As a side note: the unit of temperature Fahrenheit is named after the German physicist Daniel Gabriel Fahrenheit.

So if you have been looking for 63 °F to °C, then you are right here, too.

To convert a temperature from Fahrenheit (°F) to Celsius (°C), you can use the formula:

°C = (°F - 32) * 5/9

So, to convert 63°F to °C, you can substitute 63 for °F in the formula:

°C = (63 - 32) * 5/9

= 31 * 5/9

= 155/9

≈ 17.22°C

Therefore, 63°F is equivalent to approximately 17.22°C (rounded to two decimal places).

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Which expression can be used to find 7(-6 1/8) find the product

Answers

Answer:

Expression: 7(-6 1/8)

Product: -42 7/8

Step-by-step explanation:

7/1×−49/8 =

−343/8 =

−42 7/8

The area of a square is (16x²+24x+9) square units. Determine the length of each side of the square by factoring the area expression completely. Show your work.

Answers

The length of each side of the square by factoring the area expression are  (4x+3).

Area of a square:

A square's area is equal to the square of each side since all of its sides are the same length.

The following is the formula for determining a square's area:

A = L²

where L is the length of each side of square.

Given the area of a square expressed as 16x² + 24x + 9

Factorize 16x² + 24x + 9

16x² + 24x + 9

=  16x² + 12x + 12x + 9

= 4x(4x+3) + 3(4x+3)

= (4x+3)²

Hence the length of each side of the square is (4x+3).

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Find the value of (X -a) (X - b) (X - c) (X - d)……(x-z)

Answers

The value of the expression is (X -a) (X - b) (X - c) (X - d)……(x-z) = X26 - 26C1 X25a + 26C2 X24a2 - 26C3 X23a3 + .... + (-1)25-1a25-1 + (-1)26a26.

What is value?

Value of subjective concept that refers to the word of important that an individual group of people places on the something it is often associated with principal beliefs and the standard that are accepted by society when you can be seen as a matter of how important something is true person of organization it is often seen as a reflection of funds for view and can help to save decision.

To find the value of (X -a) (X - b) (X - c) (X - d)……(x-z), we can use the formula of expansion of a binomial expression, which is (x - y) n = xn -nC1 xn-1y + nC2 xn-2y2 - nC3 xn-3y3 + .... + (-1)n-1yn-1 + (-1)n yn.

In this case, n = 26 and x = X, and y = a, b, c, d, …, z. Therefore, the value of the expression is

(X -a) (X - b) (X - c) (X - d)……(x-z) = X26 - 26C1 X25a + 26C2 X24a2 - 26C3 X23a3 + .... + (-1)25-1a25-1 + (-1)26a26.

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Roy spent 1/2 of his money on a gameboys and 3/5 of the remainder on some books. He had $8 left.

(a) What fraction of his money did he spend on the book?
(b) How much did he had at first?

Answers

(a) The fraction of his money spend on a book is 12/40 = 3/10

Money spent on books

3/5 = x/2

3/5 = 40/2

Hence, at a fraction of money is 12/40 = 3/10

(b) Roy has money at first is $40

Roy spent money on game boys = 1/2

He spent money on books = 3/5

Let Roy has money = x

Money on game boys

= 1/2 of x = x/2

Money spent on books

= 3/5 = x/2

= 3x/10

= x/2 - 3x/10

= 5x/10 - 3x/10

= 2x/10

But the remaining money = $8

= x/5 = 8

= x = 40

Therefore, Roy has money at first = $ 40

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how much is 40 lb to kg

Answers

40 pounds (lb) is equivalent to 18.14 kilograms (kg). To convert pounds to kilograms, you need to use the conversion factor of 0.45359237 kg per pound.

This means that you can multiply the number of pounds by this conversion factor to get the equivalent weight in kilograms.

The conversion from pounds to kilograms is important when it comes to international trade and travel, where weight measurements are typically done in the metric system. Knowing how to convert between different units of measurement is also useful in scientific and engineering fields, where calculations may require using units from different systems.

It's important to note that weight and mass are not the same thing. Weight is a measure of the force exerted on an object by gravity, while mass is a measure of the amount of matter in an object. The conversion from pounds to kilograms assumes that the force of gravity is constant, but this may not always be the case in different parts of the world.

In summary, 40 pounds is equal to 18.14 kilograms, and knowing how to convert between different units of measurement is an important skill in various fields of study and in everyday life.

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The diagram shows a solid prism of length 15 cm. The cross section of the prism is the trapezium ABCD. Angle DAB = angle CDA = 90°. AB = 9 cm, DC = 6 cm and AD = 4 cm. Calculate the total surface area of the prism.​

Answers

Answer:

Total surface area of the prism = 333 cm².

Step-by-step explanation:

The total surface area of the prism is A = 420 cm²

What is the surface area of the prism?

The surface area of the prism is calculated as

The formula for the surface area of a prism is SA=2B+ph, where B, is the area of the base, p represents the perimeter of the base, and h stands for the height of the prism

Surface Area of the prism = 2B + ph

The area of the triangular prism is A = ph + ( 1/2 ) bh

Given data ,

The length of the prism L = 15 cm

Now , cross section of the prism is the trapezium ABCD

And , ∠DAB = ∠CDA = 90°

The measure of sides of the prism are

AB = 9 cm

DC = 6 cm

And , AD = 4 cm

Now , total surface area of prism is A = 2B + ph

On simplifying , we get

S₁ = ( 1/2 ) ( 6 + 9 ) ( 4 x 2 ) + ( 6 x 15 ) + ( 4 x 15 ) + ( 9 x 15 )

S₁ = 345 cm²

Now , the perpendicular CE to AB is drawn and

DC = AE = 6 cm

And , BE = AB - AE = 3 cm

BC² = CE² + BE²

On simplifying , we get

BC = 5 cm

S₂ = 5 x 15 = 75 cm²

So , the total surface area S = S₁ + S₂ = 420 cm²

Hence , the surface area of prism is S = 420 cm²

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The complete question is attached below :

The diagram shows a solid prism of length 15 cm. The cross section of the prism is the trapezium ABCD. Angle DAB = angle CDA = 90°. AB = 9 cm, DC = 6 cm and AD = 4 cm. Calculate the total surface area of the prism.​

Write the solution set of the given homogeneous system in parametric vector form. x1 + 2x2 - 15x3 = 0 2x1 + x2 - 15x3 = 0 - X1 + X2 = 0 where the solution set is x = X1 X2 X3 x = x3______

Answers

In the given homogeneous system in parametric vector form, where the solution set is x = x₁ x₂ x₃, x = x₃. where the value of x₁ = 5k, x₂ = 5k and x₃ = 10k.

The system is

x₁ + x₂ - 15x₃ = 0 .......(1)

2x₁ + x₂ - 15x₃ = 0 .......(2)

-x₁ + x₂ = 0

We write the system in the matrix form or AX = 0

Where A = ( 1   2   -15)                 and X = ( x₁)

                 ( 2   1    -15)                               (x₂)

                 ( -1   1      0)                               (x₃)

Now, | A | = [15] -2 [-15] -15 [2+1]

= 15 + 30 - 45

= 0

∴ Since, | A | = 0, ∴ Given system has non-trivial solution.

Let x₃ = k

∴ From equation (1), x₁ + x₂ = 15k

from equation (2), 2x₁ + x₂ = 15k × 2

4x₁ + 2x₃ = 30k - x₁  + 2x₂ = 15k

= 3x₁ = 15k

∴ x₁ = 5k

and x₂ = 15k - 2x₁ = 15k - 10k

∴ x₂ = 5k.

To find x₃ = x₁ + x₂

x₃ = 5k + 5k

∴ x₃ = 10k.

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In a shipment of 400 parts, 16 are found to be defective. How many defective parts should be expected in a shipment of 1,000?

Answers

We can expect 40 defective parts in a shipment of 1,000 parts.

We can use proportions to solve this problem.

The proportion of defective parts in the first shipment is:

16/400 = 0.04

This means that 4% of the parts in the first shipment are defective.

We can use this proportion to estimate the number of defective parts in a shipment of 1,000 parts.

If 4% of the parts are defective, we can set up the following proportion:

4/100 = x/1000

where x is the number of defective parts in the shipment of 1,000.

Simplifying the proportion, we get:

0.04 = x/1000

To solve for x, we can multiply both sides by 1000:

0.04 * 1000 = x

x = 40

Therefore, we can expect 40 defective parts in a shipment of 1,000 parts.

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Jamal spent $27.00 on 3 tickets to a concert. Debra bought 5 of the same tickets. How much did she spend

Answers

Debra spent 45 dollars.
she spent 45 dollars

The perimeter of a regular hexagon is 90 feet.

What is the area of the hexagon?

Enter your answer rounded to the nearest tenth in the box.

Answers

Answer: 584.6

Step-by-step explanation: I just took the test

which function has a period of pi

Answers

Answer
The functions that actually have period pi is:
A. y = sec ×

Let's understand what the period of a function is all about.

What is period of a function?
Period of a function is known to be the distance that exists between the repetition of any function. In trigonometry, the length of a complete cycle is known as a period.

So, we can see that the functions that actually have period pi is y = sec x.

WILL GIVE BRAINLIST!!!



1.) A regular hexagon has a perimeter or 57 inches.

What is the area of the hexagon? round to the nearest tenth.




2.) A regular pentagon has an area of 118.25 square meters, and each side of the pentagon measures 4.3 meters.

What is the length of an apothem or the pentagon?





3.) The perimeter of a regular hexagon is 90 feet.

What is the area of the hexagon? Round to the nearest tenth.

Answers

Answer:

Step-by-step explanation:

Since the hexagon is regular, all of its sides have the same length. Therefore, each side has a length of 57 inches / 6 = 9.5 inches.

To find the area of the hexagon, we can use the formula:

Area = (3√3 / 2) × s^2

where s is the length of a side.

Substituting s = 9.5 inches, we get:

Area = (3√3 / 2) × (9.5 inches)^2

Area ≈ 244.3 square inches

Rounding to the nearest tenth, the area of the hexagon is 244.3 square inches.

For a regular pentagon, the apothem is the distance from the center of the pentagon to the midpoint of one of its sides. We can use the formula for the area of a regular pentagon to find the apothem:

Area = (5/4) × apothem × side length

Substituting the given values, we get:

118.25 square meters = (5/4) × apothem × (4.3 meters)

apothem = 118.25 square meters / (5/4) / (4.3 meters)

apothem ≈ 8.4 meters

Therefore, the length of the apothem is approximately 8.4 meters.

Since the hexagon is regular, all of its sides have the same length. Therefore, each side has a length of 90 feet / 6 = 15 feet.

To find the area of the hexagon, we can use the same formula as in the first problem:

Area = (3√3 / 2) × s^2

Substituting s = 15 feet, we get:

Area = (3√3 / 2) × (15 feet)^2

Area ≈ 1161.4 square feet

Rounding to the nearest tenth, the area of the hexagon is 1161.4 square feet.

Consider the system of equations. y = −2x + 1 y = 3x − 4 Determine the correct graph of the system. Then, determine the correct solution.


pl please

Answers

The solution is (1, -1), which is the point where the two lines intersect.

What is linear equation ?

Linear equation can be defined as equation in which highest degree is one.

To graph the system of equations, we can first write them in slope-intercept form:

y = -2x + 1 (equation 1)

y = 3x - 4 (equation 2)

From equation 1, we can see that the y-intercept is 1 and the slope is -2. This means that if we go down 2 units and to the right 1 unit, we will find another point on the line. From equation 2, we can see that the y-intercept is -4 and the slope is 3. This means that if we go up 3 units and to the right 1 unit, we will find another point on the line.

To graph the system, we can plot these two points and draw a line through them:

(0, 1) and (1, -1)

Now, to find the solution, we need to find the point where these two lines intersect. One way to do this is to set the equations equal to each other:

-2x + 1 = 3x - 4

Adding 2x to both sides gives:

1 = 5x - 4

Adding 4 to both sides gives:

5 = 5x

Dividing both sides by 5 gives:

x = 1

Substituting this value of x into either equation gives:

y = -2(1) + 1 = -1

Therefore, the solution is (1, -1), which is the point where the two lines intersect.

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i absolutely hate khan academy help

Answers

Answer:

i do to and i need help but its not helpingggg

Step-by-step explanation:

An object is moving along the x x -axis. At t t = 0 it is at x x = 0. Its x x -component of velocity vx v x as a function of time is given by vx(t)=αt−βt3 v x ( t ) = α t − β t 3 , where α= α = 7.2 m/s2 m / s 2 and β= β = 4.8 m/s4 m / s 4 .
(a) At what nonzero time t t is the object again at x x = 0? Express your answer with the appropriate units.

Answers

An object is moving along the x x -axis. At t t = 0 it is at x x = 0. Its x x -component of velocity vx v x as a function of time is given by vx(t)=αt−βt3 v x ( t ) = α t − β t 3 , where α= α = 7.2 m/s2 m / s 2 and β= β = 4.8 m/s4 m / s 4  the nonzero time at which x = 0 is 1.22 seconds.

To find the time at which the object is again at x=0, we need to solve the equation vx(t) = 0, which gives us:

αt - βt^3 = 0

t(α - βt^2) = 0

The solutions to this equation are t = 0 (which corresponds to the initial position) and t = ±√(α/β). Since we're looking for a nonzero time, we can discard the t = 0 solution and take t = √(α/β):

t = √(α/β) = √(7.2 m/s^2 / 4.8 m/s^4) = √(1.5 s^2) = 1.22 s

Therefore, the object is again at x=0 after a time of 1.22 seconds.

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find the Mean of Absolute Deviation of 6,8,8,12,16

Answers

In reference to the question given, the mean absolute deviation of the set {6, 8, 8, 12, 16} is 2.4.

Calculating the Mean Absolute Deviation of a Set of Numbers.

To find the mean absolute deviation of a set of numbers, we first need to calculate the deviations of each number from the mean of the set, then take the absolute value of each deviation, and finally calculate the average of all the absolute deviations.

To find the mean of the set {6, 8, 8, 12, 16}, we first need to calculate the mean:

mean = (6 + 8 + 8 + 12 + 16) / 5 = 10

Next, we calculate the deviations of each number from the mean:

|6 - 10| = 4

|8 - 10| = 2

|8 - 10| = 2

|12 - 10| = 2

|16 - 10| = 6

Taking the absolute value of each deviation gives us:

4, 2, 2, 2, 6

Finally, we calculate the mean of these absolute deviations:

mean absolute deviation = (4 + 2 + 2 + 2 + 6) / 5 = 2.4

Therefore, the mean absolute deviation of the set {6, 8, 8, 12, 16} is 2.4.

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2 7/8 pounds of cheese used 1 1/4 to make sandwiches how much is left

Answers

first off, let's convert all mixed fractions to improper fractions.

[tex]\stackrel{mixed}{2\frac{7}{8}}\implies \cfrac{2\cdot 8+7}{8}\implies \stackrel{improper}{\cfrac{23}{8}} ~\hfill \stackrel{mixed}{1\frac{1}{4}} \implies \cfrac{1\cdot 4+1}{4} \implies \stackrel{improper}{\cfrac{5}{4}} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{ whole }{\cfrac{23}{8}}-\stackrel{ used }{\cfrac{5}{4}}\implies \cfrac{(1)23~~ - ~~(2)5}{\underset{\textit{using this LCD}}{8}}\implies \cfrac{23-10}{8}\implies \cfrac{13}{8}\implies \stackrel{ leftover }{1\frac{5}{8}}[/tex]

what is curve of normal distribution

Answers

The curve of a normal distribution, also known as a Gaussian distribution, is a bell-shaped curve that is symmetric around the mean.

The shape of the curve is determined by two parameters: the mean (µ) and the standard deviation (σ) of the distribution. The curve is highest at the mean, and falls off gradually as we move away from the mean in either direction.

The standard deviation controls the width of the curve, with larger values of σ resulting in wider, flatter curves, and smaller values of σ resulting in narrower, more peaked curves.

The normal distribution is a continuous probability distribution, and it is widely used in statistics to model many natural phenomena, such as the heights of people, the weights of objects, and the scores on tests. It is also commonly used in statistical inference and hypothesis testing.

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Perform the following translations on the given figures.

Answers

The coordinates of triangle A'B'C' after a translation of triangle ABC based on the transformation rule (x, y) → (x - 4, y + 3) are A' (-2, 7), B' (-2, 0), and C' (3, 0).

The coordinates of quadrilateral Q'R'S'T' after a translation based on the transformation rule are Q' (-2, 0), R' (4, 0), S' (-2, -8), and T' (-2, -8).

What is a translation?

In Mathematics, the translation of a geometric figure to the right simply means subtracting a digit to the value on the x-coordinate (x-axis) of the pre-image of a function.

By translating the coordinate of triangle ABC to the left by 4 units and vertically upward by 3 units, the coordinates include the following:

(x, y)                               →                          (x - 4, y + 3)

Coordinate A = (2, 4)   →    Coordinate A' (2 - 4, 4 + 3) = (-2, 7).

Coordinate B = (2, -3)   →    Coordinate B' (2 - 4, -3 + 3) = (-2, 0).

Coordinate C = (7, -3)   →    Coordinate C' (7 - 4, -3 + 3) = (3, 0).

By translating the coordinate of quadrilateral QRST vertically downward by 4 units, the coordinates include the following:

(x, y)                               →                          (x, y - 4)

Coordinate Q = (-2, 4)   →    Coordinate Q' (-2, 4 - 4) = (-2, 0).

Coordinate R = (4, 4)   →    Coordinate R' (4, 4 - 4) = (4, 0).

Coordinate S = (-4, -4)   →    Coordinate S' (-4, -4 - 4) = (-2, -8).

Coordinate T = (-2, -4)   →    Coordinate T' (-2, -4 - 4) = (-2, -8).

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Round your answer to the hundredth.
An investment in a savings account grows to three times the initial value after t years.
If the rate of interest is 5%, compounded continuously, t =
years.

Answers

If the rate of interest is 5%, compounded continuously, t =13.86

years.

According to given information :

Let P be the initial value of the investment.

According to the problem, the investment grows to three times the initial value after t years. This can be expressed mathematically as:

P * e^(0.05t) = 3P

where e is the mathematical constant e (approximately 2.71828).

Simplifying this equation:

e^(0.05t) = 3

Taking the natural logarithm of both sides:

ln(e^(0.05t)) = ln(3)

0.05t = ln(3)

Dividing both sides by 0.05:

t = ln(3) / 0.05 ≈ 13.86

Rounding to the nearest hundredth, we get:

t ≈ 13.86 years.

What is Compound Interest ?

Compound interest is a type of interest calculation where the interest earned on an investment is added to the principal (the initial amount invested), and then the total amount is used to calculate the interest earned for the next time period.

This means that the interest earned on an investment increases over time, as the interest earned in previous periods is added to the principal. This can result in significant growth in the value of the investment over time, particularly for long-term investments.

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Please help me solve all these because im lost and please show work.

Answers

Using arithmetic operators, the value of x are -19/5, 19/6, -9/5, 2, no solution and 9 respectively

What is the solution of each equation

To solve this problem, we need to apply basic arithmetic operators

1.

1 / (x + 4) = 5

Cross multiply both sides

5(x + 4) = 1

5x + 20 = 1

5x = -19

x = -19/5

2.

1/(x - 3) = 6

Cross multiply both sides

1 = 6(x - 3)

1 = 6x - 18

19 = 6x

x = 19/6

3.

1/(x + 2) = 5

1 = 5(x + 2)

1 = 5x + 10

5x = -9

x = -9/5

4.

1 /(2x - 3) = 1 / (5 - 2x)

cross multiply both sides

2x - 3 = 5 - 2x

collect like terms

2x + 2x = 5 + 3

4x = 8

x = 2

5.

2 - 1/(x + 3) = 1/ (x + 3)

Collect like terms

2 = 1/(x + 3) + 1/(x + 3)

2 = (x + 3) + (x + 3) / x + 3

2 = 2x + 6 / x + 3

cross multiply bot sides

2(x + 3) = 2x + 6

2x + 6 = 2x + 6

0 = 0

6.

2 / (x - 3) = 3 / x

cross multiply both sides

2x = 3(x - 3)

2x = 3x - 9

3x - 2x = 9

x = 9

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What is the conversion of 39.1 c to f ?

Answers

The value  converted from Celsius to Fahrenheit is given by 39.1 Celsius equals to 102.38 Fahrenheit.

Units  representing the measurement of the temperature in the standard form are Celsius and Fahrenheit .

Formula which relates the Celsius and Fahrenheit are given by

(°C × 9/5) + 32 =°F

Now Substitute the converted value 39.1 Celsius into Fahrenheit we get,

(39.1°C × 9/5) + 32

= ( 351.9 / 5 ) + 32

= ( 70.38 ) + 32

= 102.38°F

Therefore, the converted value from Celsius to Fahrenheit for the given temperature 39.1 Celsius is given by 102.38 Fahrenheit.

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The above question is incomplete , the complete question is:

What is the conversion of 39.1 °C to °F ?

In golf, negative scores are good. You are playing golf with Stevie one day, and you have a score of 6 over par (a positive score). Over the rest of the round, you get birdies on each hole (this means your score goes down by 1 each time you get a birdie).

a. Write an equation for your situation.

Answers

The equation for the calculation of the score will be 6-x , where x is the number of birdies (negetive score).

Lets suppose the number of birdies that have been scored is "x" . And since birdie is a negetive score, everytime we score a birdie, we need to reduce 1 from the standing score i.e. to say the total number of birdies is needed to be subustracted from the current score.

Score = Initial Score - Number of birdies

Since the initial score here, as per mentioned is 6 over par , so we need to substract the number of birdies from 6 in order to get actual score.

Therefore, in accordance with the current situation, the equation to calculate the score will be 6-x.

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What is the rank ofa 4 x 5 matrix whose null space is three dimensional? Question 7: If the rank of a 7 x 6 matrix A is 2, what is the dimension of the solution space of A x = 0? Question &: Let A be an n X p matrix whose whose column space is p dimensional. Must the columns of A be linearly independent? Question 9: Suppose that H and K are subspaces of a vector space V_ Define: H+K= {wlw=h+kfor some h € Hand some ke K} Prove that H + K is a subspace of V'

Answers

The rank-nullity theorem states that the rank of a matrix plus the dimension of its null space equals the number of columns.

Thus, if the null space of a 4 x 5 matrix is three-dimensional, then the rank of the matrix is 5 - 3 = 2.

Answer to Question 2:

The dimension of the solution space of A x = 0 is 6 - 2 = 4, since the number of columns of A is 6 and its rank is 2. The solution space of A x = 0 is the null space of A, which has dimension 4 by the rank-nullity theorem.

Answer to Question 3:

No, the columns of A do not necessarily have to be linearly independent. The column space of A is the span of its columns, which has dimension p. However, the columns of A may be linearly dependent, which means that some columns can be expressed as linear combinations of the others.

Answer to Question 4:

To prove that H + K is a subspace of V, we need to show that it satisfies three conditions:

It contains the zero vector: 0 = 0 + 0 belongs to H + K, since it can be expressed as the sum of the zero vectors in H and K.

It is closed under vector addition: if w1 and w2 belong to H + K, then there exist h1 and k1 in H and K such that w1 = h1 + k1, and there exist h2 and k2 in H and K such that w2 = h2 + k2. Therefore, w1 + w2 = (h1 + h2) + (k1 + k2) belongs to H + K, since it can be expressed as the sum of vectors in H and K.

It is closed under scalar multiplication: if w belongs to H + K and c is a scalar, then there exist h and k in H and K such that w = h + k. Therefore, c w = c h + c k belongs to H + K, since it can be expressed as the sum of vectors in H and K.

Since H + K satisfies these three conditions, it is a subspace of V.

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solve for x 4x 6x+s 8x-20 5x

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The value of x is 20 using the extension of Triangle Proportionality Theorem.

What is a Transversal line?

Transversal lines are lines that passes intersects the two lines on a plane in two different points.

Here given three parallel lines and two transversal lines cutting these parallel lines.

By the extension of Triangle Proportionality Theorem, we have "When two or more lines which are parallel to each other are cut by two transversals, then the parallel lines divide the transversals proportionally."

Applying the theorem here,

4x / 5x = (6x - 8) / (8x - 20)

4 / 5 = (6x - 8) / (8x - 20)

Cross multiplying,

4 (8x - 20) = 5 (6x - 8)

Using the distributive property,

32x - 80 = 30x - 40

2x = 40

x = 20

Hence the value of x is 20.

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When computing the correlation​ coefficient, what is the effect of changing the order of the variables on​ r?Choose the correct answer below.A. It has no effect on r.B. It changes both the sign and magnitude of r.C. It changes the magnitude of r.D. It changes the sign of r

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When computing the correlation​ coefficient, the effect of changing the order of the variables on​ r is option (A) It has no effect on r

The correlation coefficient is a measure of the strength and direction of the linear relationship between two variables.

Changing the order of the variables has no effect on the correlation coefficient, It has no effect on r.

This is because the correlation coefficient measures the degree of association between two variables, regardless of which variable is designated as the dependent variable or independent variable. The formula for the correlation coefficient is symmetrical, meaning that it yields the same result regardless of the order in which the variables are entered into the formula.

Therefore, the correct option is (A)  It has no effect on r

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Verify the following identity. Must show all work for full credit. [tex]csc^{2}(x)cos^2(x)=csc^2(x)-1[/tex]

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The left side of the function, can be simplified using trigonometric identities as follows;

csc²(x)·cos²(x) = csc²(x)·(1 - sin²(x)) = csc²(x) - 1

What are trigonometric identities?

Trigonometric identities are equations that consists of trigonometric functions that are valid for the values of the input variable of the functions.

The specified trigonometric function is presented as follows;

csc²(x)·cos²(x) = csc²(x) - 1

cos²(x) = 1 - sin²(x)

Therefore;

csc²(x)·cos²(x) = csc²(x) × (1 - sin²(x)) = csc²(x) - csc²(x) × sin²(x)

csc²(x)·cos²(x) = csc²(x) - csc²(x) × sin²(x)

csc²(x) = 1/(sin²(x)), therefore;

csc²(x)·cos²(x) = csc²(x) - csc²(x) × sin²(x) = csc²(x) - (1/(sin²(x))) × sin²(x)

(1/(sin²(x))) × sin²(x) = sin²(x) × (1/(sin²(x))) = 1

csc²(x) - (1/(sin²(x))) × sin²(x) = csc²(x) - (1/(sin²(x))) × sin²(x) = csc²(x) - 1

csc²(x)·cos²(x) = csc²(x) - (1/(sin²(x))) × sin²(x) = csc²(x) - 1

Therefore;

csc²(x)·cos²(x) = csc²(x) - 1

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What is the binomial probability formula used for?

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The binomial probability formula is used to calculate the probability of a specific number of successes in a fixed number of independent trials, where each trial can only result in success or failure. It is used to model situations where there are only two possible outcomes for each trial, and where the trials are independent and identically distributed.

The formula for binomial probability is:

[tex]P(x) = (n choose x) * p^x * (1 - p)^{n-x}\\[/tex]

where P(x) is the probability of x successes in n trials, p is the probability of success on each trial, (n choose x) is the binomial coefficient which gives the number of ways to choose x successes from n trials, and (1 - p) is the probability of failure on each trial.

The binomial probability formula can be used in a variety of applications, such as:

Predicting the probability of a certain number of defective products in a production runEstimating the likelihood of a certain number of people out of a sample having a particular characteristicAnalyzing the probability of winning a certain number of games in a sports season

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