In a school, 48% of the 1200 pupils are boys. Work out the number of boys in the school.


I thought it was 576 but it's not ​

Answer:

Step-by-step explanation:I think 3

The logarithmic equation log(x+9)-logx=3 has a solution of x = 0.0090

From the question, we have the following parameters that can be used in our computation:

log(x+9)-logx=3

Apply the quotient rule

So, we have

log((x + 9/x) = 3

Remove the logarithmic expression

So, we ave

(x + 9)/x = 10^3

Evaluate

(x + 9)/x = 1000

So, we have

1000x = x + 9

Subtract

999x = 9

So, we have

x = 0.0090

Hence, the solution is x = 0.0090

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Answer:

Step 1 : we will name the number of pounds of type A coffee were used is letter x then

We also do the same name the number of pounds of type B coffee were used in letter y.

Step 2: we will find the hints to find x and y

Hint 1 : We have total cost of two type A and type B is $560.5.

Price per pound of Type A : $9.95

Price per pound of Type B : $4.40

Cost = price per pound  * (multipe) number per pound .So we have an expression 1:

9.95 * x  + 4.4*y = 560.5

Hint 2: This month's blend used twice as many pounds of type B coffee as type A . That means the number of pounds of type B is double than the the number of pounds of  type A so we have a another expression 2:

y = 2*x (2)

Step 3: we have enough hints so we could find x (number of pounds of type A coffee)

We will pass the value of y = 2*x into the expression 1 so we get:

9.95 *x + 2*x*4.4 = 560.5

9.95x + 8.8x = 560.5

18.75x =560.5

x = 560.5 / 18.75

x = 29.89

The anwser is number of pounds of type A coffee is 29.89

The average rate of change of the function over the interval is 4

From the question, we have the following parameters that can be used in our computation:

y = 4x + 1

The interval is given as

[-1, 1)

The function is a linear function

This means that it has a constant average rate of change

From y = 4x + 1, we have

Rate = 4

Hence, the rate is 4

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The volume of the given sphere is 14130 cubic inches.

Given that, the surface area of a sphere is 900π square inches.

We know that, the surface area of a sphere is 4πr².

Here, 4πr²=900π

r²=900/4

r²=225

r=15 inches

The volume of the sphere is given by: Volume of Sphere, V = (4/3)πr³

Here, volume of a sphere = 4/3 ×3.14×15³

= 14130 cubic inches

Therefore, the volume of the given sphere is 14130 cubic inches.

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By answering the presented question, we may conclude that As a result, slope the correct answer is y = (4/5)x + 23/5.

The slope of a line indicates how steep it is. The term "gradient overflow" refers to a mathematical equation for the gradient (the change in y divided by the change in x). The slope is defined as the ratio of the vertical change (rise) between two places to the horizontal change (run). The slope-intercept form of an equation is used to express a straight line's equation, which is written as y = mx + b. The y-intercept is found where the slope of the line is m, b is b, and (0, b). For example, the slope and y-intercept of the equation y = 3x - 7 (0, 7)

To determine the equation of the line perpendicular to the line 5x + 4y = 9, travel via the point (-2, 3).

5x + 4y = 9 4y = (-5/4)x + 9/4

As a result, the slope of the supplied line is -5/4.

4/5 is the negative counterpart of -5/4.

As a result, the new line's slope will be 4/5.

y - y1 = m(x - x1), where (x1, y1) is the provided point and m is the newly discovered slope.

y - 3 = (4/5)(x + 2)

y = (4/5)x + (8/5) + 3

y = (4/5)x + 23/5

Hence the equation of the perpendicular to the line 5x + 4y = 9 line going through the point (-2, 3) is y = (4/5)x + 23/5.

As a result, the correct answer is y = (4/5)x + 23/5.

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The feasible region is the area below the line x+3y=9, below the line 3x+y=9, and to the right of the y-axis and the bottom of the x-axis.

What are the steps to make the graph for the feasible region?

To graph the feasible region, we first graph the boundary lines of the inequalities.

To graph the line x + 3y = 9, we can first find its intercepts by setting x = 0 and y = 0:

When x = 0,

3y = 9, so y = 3

When y = 0, x = 9

So the line passes through the points (0, 3) and (9, 0).

To graph the line 3x + y = 9, we can again find its intercepts:

When x = 0, y = 9

When y = 0,

3x = 9, so x = 3

So the line passes through the points (0, 9) and (3, 0).

Now we can shade the region that satisfies all the inequalities, which is the region below the line x + 3y = 9, below the line 3x + y = 9, and to the right of the y-axis and the bottom of the x-axis (since x and y must both be greater than or equal to 0).

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As a result, By substitute for "x = 3," the expression's value is **59**.

The substituting method is an easy way to use algebra to discover the solutions to the variables in a system of linear equations. It includes, as the name implies, determining the value of the x-variable in terms of the y-variable from the first equation and then substituting or replacing the value of the x-variable in the second equation

The phrase is given to us:

``` 7x² - 2x + 2 ```

It entails, as the name suggests, finding the value of the x-variable from the first equation in terms of the y-variable and then substituting or replacing

We need to figure out what this equation's answer is when "x = 3."

Therefore, in the following phrase, we substitute every instance of "x" with "3":

``` 7(3)² - 2(3) + 2

= 7(9) - 6 + 2

= 63 - 6 + 2

= 59

```

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The Volume of the given tent is calculated as: 144 cubic.units

The tent being described here is basically a triangular prism.

A triangular prism is simply referred to as a three-sided polyhedron with two parallel triangular bases and also three rectangular faces. This should not be mistaken with a pyramid. Now, to calculate the particular volume of a triangular prism, we have to first of all calculate the area of one of the triangular bases and then multiply that area by the height of the shape.

The formula used in expression for the Volume of the tent is:

V = Bh

= (¹/₂bh)h

where:

B is called base area

b is called base length

h is called height

We are given:

b = 8

h = 6

Thus:

V = (¹/₂ * 8 * 6) * 6

V = 144 cubic.units

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Answer:

Rectangular prism

Step-by-step explanation:

It's not a pyramid because it has 2 bases, so you can eliminate the choices with pyramid. The base of the figure is a rectangle, so it's a rectangular prism

Answer:

C. Rectangular prism.

Step-by-step explanation:

Answer:

192 feet of fabric

Step-by-step explanation:

Since each curtain needs to be 36 inches long, or 3 feet long, the total length of fabric needed for one curtain is 3 feet. To make 64 curtains, Ivania's curtain company will need a total of:

3 feet/curtain x 64 curtains = 192 feet of fabric

The number of feet of fabric that Ivania needs to make the curtains is 192 feet.

Multiplication of two numbers is defined as the addition of one of the number repeatedly until the times of the other number.

a × b means that a is added to itself b times or b is added to itself a times.

Given that,

Ivania's curtain company is making curtains for a local hotel.

Length of each curtain needed = 36 inches

                                                    = 36/12 feet

                                                    = 3 feet

At the fabric store, fabric is sold by the foot.

Number of curtains needed to make = 64

We have to multiply the length of each curtain with the total number of curtains to find the total length of the curtain needed.

Feet needed = 64 × 3 feet = 192 feet

Hence the feet of curtains needed is 192 feet.

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Using the congruency for similar triangles, we can find the length of d to be = 21.42m.

Triangles that are similar to one another but may not be exactly the same size are said to be comparable. Similar items are ones whose sizes vary but whose shapes are the same. This demonstrates how shapes superimpose one another when they are amplified or demagnified. "Similarity" refers to this quality of comparable shapes.

Here in the question,

The triangles are similar, so:

The sides are proportional to each other here.

That shows:

d/10 = 45/21

⇒ d = (45 × 10)/21

⇒ d = 450/21

⇒ d = 21.42m.

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Answer: The actual answer was 21.4

Step-by-step explanation:it won’t let you put in the full decimal

The value of the principal investment is approximately $6,752.18 rounded to the nearest hundredths place.

Simple interest is a technique used to calculate the proportion of interest paid on a sum over a set time period at a set rate. The principal amount remains constant in simple interest. Simple interest is a straightforward and easy technique for calculating interest in money.

The given equation is:

A = [tex]P(1 + 0.06/4)^4t[/tex]

where A is the amount in the account after t years, P is the principal investment, and 0.06 is the annual interest rate.

We are given that after 15 years, the amount in the account is $16,497.06. So we can substitute A = $16,497.06 and t = 15 into the equation above and solve for P:

$16,497.06 = [tex]P(1 + 0.06/4)^{4 *15}[/tex]

$16,497.06 = [tex]P(1.015)^{60}[/tex]

P = [tex]$16,497.06 / (1.015)^{60}[/tex]

Using a calculator, we get:

P ≈ $6,752.18

Therefore, the value of the principal investment is approximately $6,752.18 rounded to the nearest hundredths place.

Hence, the answer is $6,752.18.

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The 90% confidence interval for the sample mean is approximately [tex](5.26, 6.74)[/tex].

To find the 90% confidence interval for a sample of 64 with a mean of 6 and a standard deviation of 3, you can use the formula:

[tex]CI = \bar x\ _-^+\ Z_{\alpha/2} * (\sigma/ \sqrt n)[/tex]

where,

CI is the confidence interval

[tex]\bar X[/tex] is the sample mean =6

[tex]Z_{\alpha/2} = 1.645[/tex]  i.e. 90% confidence.

σ is the population standard deviation =3

n is the sample size = 64

So the expression to simplify would be:

[tex]6\ _-^+ \ 1.645 * (3/\sqrt{64})[/tex]

Simplifying this expression gives:

[tex]= 6\ _-^+\ 0.7378125\\[/tex]

So, The 90% confidence interval for the sample mean is approximately [tex](5.26, 6.74)[/tex].

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The solution is :

|t|  =  2.739 > 1.972 at 0.05 level of significance

Null hypothesis is rejected  at 0.05 level of significance

The researchers able to conclude from this data that the mean commute time in the U.S. is less than half an hour

We have,

Step(i):-

Given sample size n = 500

Given data

mean of the sample x⁻ = 27.6 minutes

Standard deviation of the sample (S) =  19.6 minutes

Mean of the Population 'μ' = half an hour or 30 minutes

Level of significance ∝ =0.05

t₀.₀₅ = 1.972

Step(ii):-

Null hypothesis :H₀: μ= 30

Alternative Hypothesis :H₁: μ < 30

Test statistic

t = x - mean / s/√n

so, we get,

t = - 2.739

|t| = |-2.739| = 2.739

Final answer:-

|t|  =  2.739 > 1.972 at 0.05 level of significance

Null hypothesis is rejected  at 0.05 level of significance

The researchers able to conclude from this data that the mean commute time in the U.S. is less than half an hour.

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complete question:

Commute times in the U.S. are heavily skewed to the right. We select a random sample of 500 people from the 2000 U.S. Census who reported a non-zero commute time. In this sample the mean commute time is 27.6 minutes with a standard deviation of 19.6 minutes. Are researchers able to conclude from this data that the mean commute time in the U.S. is less than half an hour? Conduct a hypothesis test at the 5% level of significance using StatCrunch (directions) or calculating T and using the T-Distribution Calculator above. Based on your hypothesis test, what can we conclude?

Answer:  The formula in cell C8 that divides the product of cells C5 through C7 by cell C4 is:

=(C5C6C7)/C4

Step-by-step explanation:

To divide the product of cells C5 through C7 by cell C4, use the formula =PRODUCT(C5:C7)/C4.

To divide the product of cells C5 through C7 by cell C4 in cell C8, you can use the formula =PRODUCT(C5:C7)/C4.

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The baker's shelf will cost $336.00.

What is the perimeter?

The perimeter is a mathematical term that refers to the total distance around the outside of a two-dimensional shape. It is the length of the boundary or the sum of the lengths of all the sides of a closed figure.

To calculate the cost of the wooden shelf, we first need to find the perimeter of the bakery:

Perimeter = 2 × (length + width)

Perimeter = 2 × (14 yards + 10 yards)

Perimeter = 48 yards

So the baker needs 48 yards of wooden shelf.

The cost of the wooden shelf is $7.00 per yard, so we can find the total cost by multiplying the number of yards by the cost per yard:

Total cost = 48 yards × $7.00 per yard

Total cost = $336.00

Therefore, the baker's shelf will cost $336.00.

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Answer:

3

Step-by-step explanation:

To find the missing term in the geometric sequence 6, [?], 3/2, we can use the formula for the nth term of a geometric sequence:

an = a1 * r^(n-1)

where a1 is the first term, r is the common ratio, and n is the term number.

We know that the first term is 6, and the third term is 3/2. So, we can write:

a1 = 6

an = 3/2

Using the formula above, we can solve for the common ratio:

an = a1 * r^(n-1)

3/2 = 6 * r^(3-1)

3/2 = 6r^2

r^2 = 1/4

r = 1/2 or r = -1/2

Since the common ratio is positive (the sequence is increasing), we can take r = 1/2. Now we can use the formula to find the missing term:

an = a1 * r^(n-1)

an = 6 * (1/2)^(n-1)

To find the missing term, we need to find the value of n. We know that the missing term is between 6 and 3/2, so it must be less than 6. We can try plugging in different values of n until we find the one that gives a term between 6 and 3/2:

n = 2: a2 = 6 * (1/2)^(2-1) = 3

n = 3: a3 = 6 * (1/2)^(3-1) = 1.5

Therefore, the missing term in the sequence is 3.

Answer:

a) f(1) = 3

b) f(-1) = -0.25

c) x = 0, 3

d) x = -0.75

e) domain   [-2, 4]

    range   [-1, 3]

Step-by-step explanation:

In this graph, f(x) is represented by the y-axis.

a) We can see that f(1) (the y-value when x = 1) is 3.

b) Looking at the graph, we can estimate f(-1) as about -0.25.

c) We need to find the x-values when the y-axis is at 1. We can see that there are two points at x = 0, 3.

d) Looking at the graph, we can estimate that f(x) = 0 around when x = -0.75.

e) The domain of a function is its set of x-values. We can see that f(x) spans from x = -2 to x = 4. That range in interval notation is: [-2, 4]

The range of a function is its set of y-values. We can see that f(x) spans from y = -1 to y = 3. That range in interval notation is: [-1, 3].

Here's a way to help you find the measure of an angle

An angle is the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.

The calculated length of the segment RP has a value of 150 units

From the question, we have the following parameters that can be used in our computation:

QW = 11

VP = 50

TU = 90

The length RP is

RP = RQ + QP

Where

QP^2 = (50 + 11)^2 - 11^2 --- Pythagoras theorem

So, we have

QP^2 = 3600

This gives

QP = 60

Recal that

RP = RQ + QP

Where

RQ = TU = 90

So, we have

RP = 90 + 60

Evaluate

RP = 150

Hence, the length RP is 150 units

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The answer of the given question based on the rectangular pyramid is ,  the height of the pyramid is 24 units.

Volume is the amount of space occupied by an object or a substance. It is a three-dimensional measurement that is expressed in units like cubic meters, cubic centimeters, liters, or gallons.

The volume of  rectangular pyramid is given by formula:

V = (1/3) * B * h

where V is the volume, B is the area of the rectangular base, and h is the height of the pyramid.

In this problem, we are given that the volume of the pyramid is 1824 units^3, and the length and width of the rectangular base are 12 units and 19 units, respectively. We can use this information to find the area of the rectangular base:

B = length * width = 12 * 19 = 228 units²

Substituting this value and the formula for the volume into the equation above, we get:

1824 = (1/3) * 228 * h

Multiplying both sides by 3, we get:

3 * 1824 = 228 * h

Simplifying, we get:

5472 = 228 * h

Dividing both sides by 228, we get:

h = 5472 / 228

Simplifying, we get:

h = 24

Therefore, the height of the pyramid is 24 units.

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The length of the three carts that are stacked together would be = 35.5 in

To calculate the length of the three cart stacked together, the following steps should be taken.

The length of a cart that is unstacked = 36 in.

The length of 6 carts that are stacked together = 71 in.

That is;

If 6 carts = 71 in

3 carts = X in

Make X in the subject of formula;

X in = 3×71/6

= 213/6

= 35.5 in

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30 minutes later than 3 hours and 45 minutes is 4 hours and 15 minutes.

One of the four fundamental mathematical processes, along with addition, subtraction, multiplication, and division, is addition.

To calculate 30 minutes later from 3 hours and 45 minutes, you can simply add 30 minutes to the given time.

Start with the given time: 3 hours and 45 minutes

Add 30 minutes: 45 minutes + 30 minutes = 75 minutes

Since there are 60 minutes in an hour, we can convert 75 minutes to hours and minutes:

75 minutes = 1 hour and 15 minutes

Therefore, 30 minutes later than 3 hours and 45 minutes is 4 hours and 15 minutes.

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Answer:

what do you mean by land ?

The intensity of sound is proportional to the square of its amplitude.

Thus, if I9 and I8 are the intensities of sounds at 9 decibels and 8 decibels respectively, then:

I9/I8 = (10^(9/10))/(10^(8/10))

I9/I8 = 10^(0.1)

I9/I8 = 1.2589

Therefore, the relative intensity of 9 decibels is approximately 1.26 times higher than that of 8 decibels.

May I please have a Brainliest? I put a lot of thought and effort into my answers, so I would really appreciate it!

The equation with the given coordinate points is y=-3x-1.

The given coordinate points are (0, -1) and (1, -4).

Here, slope (m) = (-4-(-1))/(1-0)

= (-4+1)/1

= -3

Substitute m=-3 and (x, y)=(0, -1) in y=mx+c, we get

-1=-3(0)+c

c=-1

Substitute m=-3 and c=-1 in y=mx+c, we get

y=-3x-1

So, the equation is y-3x-1

Therefore, the equation with the given coordinate points is y=-3x-1.

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As per the given polygon, the direction and angle of rotation is a 90° clockwise rotation.

The image shows that polygon ABC is in quadrant 4, while its rotated image A' B' C' is in quadrant 3. This means that the rotation is clockwise.

To determine the angle of rotation, we can see that the vertices A and A' are located 6 units apart on the x-axis. Similarly, B and B' are located 4 units apart on the y-axis. This means that the rotation is a combination of a translation and a rotation.

To find the angle of rotation, we need to determine the angle between the line segments of polygon AA' and BB'. We can use the tangent function to find this angle:

tanθ = 4/6 = 2/3

θ ≈ 33.69°

Therefore, the direction and angle of rotation is a 90° clockwise rotation.

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Answer:

The three options that result in a difference of squares are:

(x minus y)(x plus y)

(6 minus y)(6 plus y)

(64 y squared + x squared)(64 y squared - x squared)

Answer:

2/3

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