I'll give brainliest

Answer:

[tex]z = -2.1875[/tex]

Step-by-step explanation:

The z score is given by the formula
[tex]z = \dfrac{x - \mu}{\sigma}[/tex]

where

[tex]z =[/tex] standard score

[tex]x[/tex] = data point = 45 for this problem
[tex]\mu[/tex] = mean = 52 for this problem
[tex]\sigma =[/tex] standard deviation = 3.2 for this problem

Therefore
[tex]z = \dfrac{45 - 52}{3.2} = -2.1875[/tex]

The probability that the first winner lives in Wells and the second lives in Gaston 1/9.

Probability refers to potential. A random event's occurrence is the subject of this area of mathematics.

The range of the value is 0 to 1. Mathematics has incorporated probability to forecast the likelihood of various events.

The degree to which something is likely to happen is basically what probability means.

Given:

Total number of customers entering the drawing = 9

Number of customers from Gaston = 4

Number of customers from Pike = 3

Number of customers from Wells = 2

Now the probability for the first winner to be from Wells will be

= 2/9

and,  Probability of second winner to be from Gaston will be

= 4/8

= 1/2

So, the probability is

= 2/9 x 1/2

= 1/9.

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Answer:

Step-by-step explanation:

We need to show that the path given by r(t) = (e^t sin t, e^(-t) cos t, e) intersects the sphere 2y^2 + 2z^2 = 4 once, traveling from outside the sphere to inside as t goes from -∞ to +∞.

The equation of the sphere is 2y^2 + 2z^2 = 4. To find the intersection points of the path and the sphere, we need to substitute the components of r(t) into the equation of the sphere:

2y^2 + 2z^2 = 4

2(e^(-t) cos t)^2 + 2e^2 = 4

2e^(-2t) cos^2(t) + 2e^2 = 4

e^(-2t) cos^2(t) + e^2 = 2

Multiplying both sides by e^(2t), we get:

cos^2(t) + e^(4t) = 2e^(2t)

We can rewrite this equation as:

e^(4t) - 2e^(2t)cos^2(t) + cos^2(t) - 1 = 0

This is a quadratic equation in e^(2t) with solutions:

e^(2t) = cos^2(t) ± sqrt(cos^4(t) - 4(cos^2(t) - 1))

We want to show that there is only one intersection point, which means we want to show that the discriminant of the quadratic is negative, i.e.:

cos^4(t) - 4(cos^2(t) - 1) < 0

Expanding the left-hand side, we get:

cos^4(t) - 4cos^2(t) + 4 < 0

Simplifying, we get:

(cos^2(t) - 2)^2 < 0

Since the square of a real number is always non-negative, this inequality has no real solutions. Therefore, the discriminant of the quadratic is negative, and there is only one intersection point.

To show that the path travels from outside the sphere to inside as t goes from -∞ to +∞, we can observe that as t goes from -∞ to +∞, the first component of r(t) goes from -∞ to +∞, while the second and third components oscillate between 0 and +∞. This means that the path starts outside the sphere (at the point (0, +∞, +∞)) and ends inside the sphere (at the point (+∞, 1, 1)). Therefore, the path must intersect the sphere once, traveling from outside to inside.

1)

The value of x is 30.5.

The measure of each angle is:

∠1  = ∠3 = ∠6 = ∠4 = 94

∠2 = ∠5 = 86

2)

The measure of ∠b is 60.7.

The measure of ∠d is 43.1.

The angles that are in the same position on two parallel lines intersected by a transversal line on the parallel lines.

Corresponding angles are equal.

We have,

1)

Since line m and line n are parallel.

(2x + 25) and 86 are alternate interior angles.

So,

2x + 25 = 86
2x = 86 - 25

2x = 61

x = 30.5

And,

∠2 and 86 are opposite angles.

So,

∠2 = 86

∠1 and ∠3 are opposite angles.

So,

∠1 = ∠3

And,

∠3 + 86 = 180

∠3 = 180 - 86

∠3 = 94

∠3 and ∠4 are alternate interior angles.

So,

∠3 = ∠4 = 94

∠1 and ∠6 are exterior alternate angles.

∠2 and ∠5 are exterior alternate angles.

So,

∠1 = ∠6 = 94

∠2 = ∠5 = 86

2)

Line m and line n are parallel.

So,

∠b and 60.7 are alternate interior angles.

∠d and 43.1 are alternate interiro angles.

So,

∠b = 60.7

∠d = 43.1

Thus,

1)

The value of x is 30.5.

∠1  = ∠3 = ∠6 = ∠4 = 94

∠2 = ∠5 = 86

2)

∠b = 60.7

∠d = 43.1

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Trains make up approximately 49.04% of the total journeys across all modes of transportation.

We must divide the total number of train trips by the total number of trips made using all modes of transportation, then multiply the result by 100 to get the percentage that trains make up of the total.

There have been 2320 train trips overall, and there have been 4730 trips overall using all forms of transportation.

Trains therefore account for the following proportion of the total:

(2320 / 4730) x 100% = 49.04%

Train travel thus accounts for roughly 49.04 percent of all travels made using all modes of transportation.

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Answer:

[tex]3p + 5p = 8p + 7[/tex]

Step-by-step explanation:

I don't know how to explain it, but

[tex]3p + 5p = 8p + 7[/tex]

Simplifying this

[tex]8p = 8p + 7[/tex]

It will never equal because no matter what number you put for P, one will always be 7 greater than the other

Answer:

2x + h - 5

Step-by-step explanation:

To find f(x + h) we simply plug (x + h) into the function f(x), anywhere we see an x.

[tex]f(x) = x^{2} -5x+9\\f(x+h) = (x+h)^{2}-5(x+h)+9[/tex]

Now we can plug them into the fraction:

[tex]\frac{((x+h)^{2}-5(x+h)+9)-(x^{2} -5x+9)}{h}[/tex]

Expanding all of the terms, we get:

[tex]\frac{(x^{2} +2hx + h^{2} -5x-5h+9)-(x^{2} -5x+9)}{h}[/tex]

Distributing the negative we get:

[tex]\frac{x^{2} +2hx + h^{2} -5x-5h+9-x^{2} +5x-9}{h}[/tex]

Now we see that [tex]x^{2} -x^{2} ,-5x+5x,[/tex] and [tex]9-9[/tex] all cancel, leaving us with:

[tex]\frac{2hx + h^{2}-5h}{h}[/tex] (Notice the only terms left are those with h in them)

As every term contains an h, we can remove an h from every term, giving us:

2x + h - 5

Answer:   3

Step-by-step exp lanation:

divided

The length of PR is 4.8 units.

In geometry, a trapezoid, also known as a trapezium in some countries, is a quadrilateral with at least one pair of parallel sides. The parallel sides are called the bases of the trapezoid, while the non-parallel sides are called the legs. The angle between the bases of a trapezoid determines its height.

Trapezoids can be classified into several types based on their properties, such as:

Isosceles trapezoid: a trapezoid with congruent legs.

Right trapezoid: a trapezoid with a right angle between one of its legs and one of its bases.

Scalene trapezoid: a trapezoid with no congruent sides.

Since QR is parallel to NO, we have:

∆PNQ ~ ∆PRO (by AA similarity)

So we can write:

PR/PQ = PO/PN

PR/7.2 = 6/9

PR = 7.2 × 6/9

PR = 4.8

Therefore, the length of PR is 4.8 units.

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The volume of grains stored in Adam's family farm in m³ is 14.374m³.

What is meant by volume?

Each thing in three dimensions takes up some space. The volume of this area is what is being measured. The space occupied within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity. Knowing an object's volume can help us figure out how much a substance is needed to fill it, such as how much water is needed to fill a bottle. Cubic units are used to quantify a solid's volume. Volume is another word for capacity.

Given,

 The volume of grains stored in the farm = 18.8 yards³

It is given that 1 yard = 0.9144 m

We are asked to find the above volume of grains from yards³ to m³

if

1 yard = 0.9144 m

1 yard³ = 0.9144 m * 0.9144 m * 0.9144 m

18.8 yards³ = 18.8 * 0.9144*0.9144*0.9144 = 14.374 m³

Therefore the volume of grains stored in the farm in m³ is 14.374m³.

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The solution of the equation are y=9 and x=4

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

WE are given that the system of equation;

5x+6y=26 and 10x-6y=-2

5x+6y=50

-1(-x+6y=26)

X-6y=-26

Then Eliminate the y and combine evrything

6x=24

Divide 6 both sides

X=4

Then, substitute the x

-(4)+6y=50

-4+6y=50

Add 4 both sides

6y=54

y=9 and x=4

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Answer:

Step-by-step explanation:

Polynomials are a type of mathematical expression that involve variables raised to powers and added or subtracted together. They have many applications in the real world, ranging from science and engineering to finance and economics. Here are a few examples:

Physics: Polynomials are used to describe the motion of objects in space. For example, the position of a moving object over time can be represented by a polynomial function.

Engineering: Polynomials are used to design and analyze complex systems, such as electrical circuits and control systems.

Computer graphics: Polynomials are used to create curves and shapes in 3D modeling and computer graphics.

Finance: Polynomials are used in financial modeling to represent trends and make predictions. For example, a polynomial function could be used to model the growth of a company's revenue over time.

Data analysis: Polynomials are used to fit curves to data in order to make predictions or gain insights. For example, a polynomial function could be used to model the relationship between a company's advertising budget and its sales.

Overall, polynomials are a powerful tool in mathematics and have many practical applications in various fields.

Answer:

-4

Step-by-step explanation:

-5 x -12/ 3 x -5

60/-15

-4

Answer:

40x + 17(468-x) = 11912

       23x = 11912 - 17*468     |Solve for x and then find (468-x) as well

Answer:

middle set of data

Step-by-step explanation:

The interval in set builder notation is {x : x ≥ -2 and x < 3, where x ∈ R} and the graph of the interval is given below.

Set builder form is used to represent the numbers in a set especially infinite numbers in a set using a statement which describes all the elements in the set.

Given interval is [-2, 3).

This is a closed interval from -2 and open interval at 3.

So, this interval contains all the elements from -2 to 3 where 3 is not included.

So, the set builder form can be written as,

{x : x ≥ -2 and x < 3, where x ∈ R}

The graph of the interval on the number line will be a straight line with closed circle at -2 and open circle at 3.

Hence the set builder form is {x : x ≥ -2 and x < 3, where x ∈ R}.

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[tex]\dfrac{x^2-15x+36}{5x-60}[/tex]

[tex]= \dfrac{(x-3)(x-12)}{5x-60}[/tex]

[tex]= \dfrac{(x-3)(x-12)}{5(x-12)}[/tex]

[tex]= \dfrac{(x-3)}{5}\\= \dfrac{x-3}{5}[/tex]

[tex]\dfrac{x-3}{5}[/tex], [tex]x\neq12[/tex]

Answer:

The answer is D.

Step-by-step explanation:

The solution of the system of equations is:

x = 12, y = 11, z = 2

We can rewrite our system of equations as:

x + y + z = 25

5x + y + 9z = 89

-7x + 6y + 6z = -6

First, if we subtract the first equation and the second one, we will get:

(5x + y + 9z) - (x + y + z) = 89 - 25

4x + 8z = 64

And if we subtract 6 times the first equation from the third one, we will get:

-7x + 6y + 6z - 6*(x + y + z) = -6 - 6*25

-13x = -156

We can solve this for x:

x = -156/-13 = 12

Now we know the value of x, replacing it in:

4x + 8z = 64

Will give:

4*12 + 8z = 64

8z = 64 - 4*12 = 16

z = 16/8 = 2

And the value of y will be given by:

x + y + z = 25

12 + y + 2 = 25

14 + y = 25

y = 25 - 14 = 11

Then the solution is:

x = 12, y = 11, z = 2

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The probability that the teacher will choose two girls would be = 1/6

Probability is defined as the expression that shows the possibility of an outcome of an event which may or may not happen.

The total number of students in the class = 9

The total number of girls = 4

The total number of boys = 5

The formula for finding probability = No of favourable outcome/Total number of outcomes.

The probability that teacher choose first girl = 4/9

One girl is selected we must reduce the number of girls available for selection to 4 - 1 = 3.

We must also reduce the number of children available for selection 9 - 1 = 8.

The probability that teacher choose second girl = 3/8

Thus, the probability = 4/9 × 3/8 = 1/6

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The key features of this rational function include the following:

Domain: (-∞, 2) ∪ (2, ∞)

Range: (-∞, 1) ∪ (1, ∞)

Y-intercept: 1.

X-intercept: 2.

Vertical asymptote: x = -2.

Horizontal asymptote​: y = -1.

In Mathematics, a rational function simply refers to a type of function  which is expressed as a fraction. This ultimately implies that, a rational function is composed of two (2) main parts and these include the following:

Additionally, the vertical extent of any graph of a rational function represents all range values and they are always read and written from smaller to larger numerical values, and from the bottom of the graph to the top.

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Answer:

View Screenshot

Step-by-step explanation:

This equation demonstrates the distributive property of multiplication

What is distributive property ?

In mathematics, the distributive property is a property of binary operations that applies to numbers, sets, or other mathematical objects. It governs how to perform the operation of multiplication over addition or subtraction. The distributive property states that for any numbers a, b, and c:

a × (b + c) = a × b + a × c (multiplication distributes over addition)

or

a × (b - c) = a × b - a × c (multiplication distributes over subtraction)


The property demonstrated in this equation is the distributive property of multiplication over addition. This property states that the product of a number and the sum of two or more numbers is equal to the sum of the products of the number and each of the individual numbers. In other words, a(b + c) = ab + ac.

In this case, 15 is being multiplied by the sum of 5 and 7, which is equivalent to multiplying 15 by 5 and 15 by 7 separately and adding the results. So, we have:

15(5 + 7) = 15 x 5 + 15 x 7

This equation demonstrates the distributive property of multiplication over addition.

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Answer:

there is an error in the question. if you compute ac - ab = 4 you get -2x+4 =4 that leads to x=0.

if so, ab = -6 and this is not allowed.

Answer:

102

Step-by-step explanation:

Angles in a quadrilateral is 360

120+85+53=258

360-258=102

Hope this helps!

Answer: it will be square or rhombus

Step-by-step explanation:

Answer:

3(x + 5y) - 2(x + y)

3x + 15y - 2x - 2y

x + 13y

(3x + 15y) + (-2x + -2y)

x + 13y

Answer:

c = -5

Step-by-step explanation:

[tex]\frac{1}{4} c+2=\frac{3}{4}[/tex]

Subtract 2 on both sides

[tex]\frac{1}{4} c=-1\frac{1}{4}[/tex]

Divide by [tex]\frac{1}{4}[/tex]

[tex]c=-5[/tex]