help, please !!!!!!!! **50points**

Answer:

\( \bar x = 40, s =10\)

And from these values we can estimate the sample variance like this:

\( s^2 = 10^2 =100\)

And we can also estimate the coeffcient of variation given by:

\( \hat{CV} =\frac{s}{\bar x}\)

And replacing we got:

\( \hat{CV} = \frac{10}{40}= 0.25\)

And this coefficient is useful in order to see the variability in terms of the mean for this case since is lower than 1 we can conclude that this variation around the mean is low.

Step-by-step explanation:

For this case we have the following info given:

\( \bar x = 40, s =10\)

And from these values we can estimate the sample variance like this:

\( s^2 = 10^2 =100\)

And we can also estimate the coeffcient of variation given by:

\( \hat{CV} =\frac{s}{\bar x}\)

And replacing we got:

\( \hat{CV} = \frac{10}{40}= 0.25\)

And this coefficient is useful in order to see the variability in terms of the mean for this case since is lower than 1 we can conclude that this variation around the mean is low.

There are 540 men living in the mini city.

x + (x + 150) = 1230

Simplifying this equation, we get:

2x + 150 = 1230

Subtracting 150 from both sides, we get:

2x = 1080

Dividing both sides by 2, we get:

x = 540

Therefore, there are 540 men living in the mini city.

To check our answer, we can substitute x = 540 into our original equation:

540 + (540 + 150) = 1230

690 = 1230

This is false, so there must be an error in our calculation. We can double-check our work by trying a different approach.

We know that the number of women exceeds the number of men by 150, so we can represent the number of women as (x + 150). We also know that the total number of people is 1230, so we can set up an equation:

x + (x + 150) = 1230

Simplifying this equation, we get:

2x + 150 = 1230

Subtracting 150 from both sides, we get:

2x = 1080

Dividing both sides by 2, we get:

x = 540

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Answer:

He saved $121

Step-by-step explanation:

All you have to do is divide $726/6 which gives you $121.

Answer:20

Step-by-step explanation:this is wrong

Answer:

40

Step-by-step explanation:

subtract median of dogs and median of cats

Answer:

2 * sqrt(61)

Step-by-step explanation:

a = 10

b = 12

c = ?

c^2 = a^2 + b^2

c^2 = 10^2 + 12^2

c^2 = 100 + 144

c^2 = 244

c^2 = 4 * 61

sqrt(c^2) = sqrt(4) * sqrt(61)

c = 2 * sqrt(61)

Answer:

A = {2, 4}

Step-by-step explanation:

This can be written as

A = {2, 4}

Answer:

75

Step-by-step explanation:

its 15 times 5 (i think this is wrong it seems too easy)

Answer:

make a ratio which is 50 over 15 equals 10 over x. then you have 50x over 50 because you have to cross multiply equals 150 over 50 then you get the answer three

Step-by-step explanation:

you had to make a ration and cross multiply

Answer:

2.5

Step-by-step explanation:

the length has increased by 7.5/3 = 2.5.

so the scale factor is 2.5

b r = 178 + h;

b r + h = 676;

then, 178 + 2h = 676 => h = 498/2 = 249 => b r = 178 + 249 = 427

Answer:

676

Step-by-step explanation:

h=b+178=427

b=b=249

-------------

(b+178)+b=676

2b+178=676

2b=498

b=249

-------------

249+427=676

Kaneppeleqw and 2 more u

Given:

--------------------------------------------------------------------

Shape: half of a parabola

Domain: Non- negative numbers x∈ [0, +∞)

Range:​ Non- negative numbers y∈ [0, +∞)

we will assume a sample size of 50 and four clusters of equal size (i.e., 12 or 13 students per cluster). Mean: To find the mean, we add up all the ages and divide by the total number of students:

(12 + 13 + 14 + 15 + 16 + 10 + 11 + 15 + 10 + 13 + 12 + 11 + 10 + 14 + 16 + 11 + 10 + 14 + 16 + 11 + 13 + 15 + 10 + 12 + 14 + 13 + 15 + 16 + 10 + 14 + 11 + 10 + 14 + 14 + 15 + 12 + 10 + 12 + 13 + 14 + 16 + 15 + 10 + 13 + 14 + 15 + 15 + 12 + 10 + 14) / 50 = 12.56

Therefore, the mean age of the JHS 1 students in the sample is approximately 12.56 years old.

Median:

To find the median, we first need to put the ages in order from smallest to largest:

10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16, 16, 16, 16

Since there are an even number of ages (50), the median will be the average of the two middle values, which are 13 and 14:

(13 + 14) / 2 = 13.5

Therefore, the median age of the JHS 1 students in the sample is 13.5 years old.

Mode:

To find the mode, we need to determine which age appears most frequently in the sample. From the list above, we can see that the age of 10 appears 11 times, which is more than any other age. Therefore, the mode age of the JHS 1 students in the sample is 10 years old.

Standard deviation:

To find the standard deviation, we can use the following formula:

sqrt((sum of (x - mean)^2) / (n - 1))

where x is the age of each student, mean is the mean age we calculated earlier, and n is the sample size.

Using this formula and the ages from the sample, we get:

sqrt(((12 - 12.56)^2 + (13 - 12.56)^2 + ... + (14 - 12.56)^2) / (50 - 1)) = 2.38

Therefore, the standard deviation of the ages in the sample is approximately 2.38 years.

Skewness:

To determine the skewness of the data, we need to calculate the third standardized moment, which is given by the following formula:

(sum of ((x - mean)^3 / stdev^3)) / n

Using this formula and the ages from the sample, we get:

((12 - 12.56)^3

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The value of sin A is, 7/25.

The circle is a closed two dimensional figure , in which the set of all points is equidistance from the center.

We have to given that;

The terminal side of angle A goes through the point (−24/25,7/25) on the unit circle.

Now, By definition we get;

⇒ cos A = - 24/25

⇒ Sin A = 7/25

Thus, The value of sin A is, 7/25.

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First we turn the 17.2 km into mm. To do that we turn it into 17,200 m then into 1,720,000 cm then into 17,200,000 mm. Then we just divide 17.2 million by 86 so 17,200,000÷86=200,000. so we know that the scale of the map is 1:200,000. Also pls mark as brainliest answer thx.

Let’s solve the equation x^2 - 4x = 5 by factoring:

First, we’ll move all the terms to one side of the equation:

x^2 - 4x - 5 = 0

Now, we’ll factor the left side of the equation. We’re looking for two numbers that multiply to -5 and add to -4. Those numbers are -5 and 1. So we can write:

(x - 5) (x + 1) = 0

Now we’ll use the zero-product property to solve for x. This property states that if the product of two numbers is zero, then at least one of the numbers must be zero. So we have:

x - 5 = 0 or x + 1 = 0

Solving each equation separately, we find that x = 5 or x = -1.

So, the solutions to the equation x^2 - 4x = 5 are x = 5 and x = -1.

Based on the information given, we know that the two triangles have two pairs of congruent angles. This is sufficient to prove that the two triangles are congruent using the AAS (Angle-Angle-Side) postulate. Therefore, the method I would use to prove the two triangles congruent is **AAS**.

Answer:

Step-by-step explanation:

Answer:

20/7 dollars per hour

Step-by-step explanation:

He pays 10 dollars per 3 1/2 hours. To find the unit rate, we divide the two.

10 / (3 1/2) =

10 / (7/2) =

(10/1) x (2/7) =

20/7

Answer:

The answer is - 4/5

Step-by-step explanation:

Because the "opposite" of a number is its inverse operation, therefore it is negative 4/5

Answer:

i think its the firt one

Step-by-step explanation:

Answer:

answer a

Step-by-step explanation:

we have that

the distance city B to city C is equal to

405+401=806 miles4

therefore

the answer is

Answer:

(1)

Step-by-step explanation:

11111111111111111111111

Answer:

haha you are not going anywhere else to say it

Answer:

867.44 ft²

Step-by-step explanation:

The area of the shaded region is A = 196π + 252.

We have the dimensions of the unshaded region are 14ft x 18ft.

We have to find the area of shaded region.

The area of a rectangle is -

A(R) = Length x Breadth = L x B

and the area of Circle is -

A(C) = \(\pi r^{2}\)

According to the question -

Dimensions of the unshaded region -

L = 18ft

B = 14ft

Area of the shaded region (A) = Total Area - Area of Rectangle

Total Area = Area of 2 semicircles of radius (7 + 7) 14ft + Area of rectangle of length 18ft and breadth 28ft.

Total Area = ( \(2\times \frac{1}{2}\times \pi \times14 \times 14\) ) + ( 18 x 28)

Total Area = 196π + 504

Area of the shaded region (A) = 196π + 504 - 252 = 196π + 252

Hence, the area of the shaded region is A = 196π + 252.

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The distance between the two points is approximately 5.66 units

Using the formula for the distance between two points on a coordinate plane:

Distance = √[(y2 - y1)^2 + (x2 - x1)^2]

We can plug in the given values into the distance formula:

given that

y2 = 9, y1 = 13, x2 = 4, and x1 = 0

= √[(9 - 13)^2 + (4 - 0)^2]

= √[(-4)^2 + (4)^2]

= √(16 + 16)

= √32

= 4√2

= 5.6569

= 5.66

Therefore, the distance between the two points is approximately 5.66 units, which corresponds to option A.

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The length of the base of the triangle is 8 yards whose height is half of 28 yards.

A triangle is a two-dimensional geometric shape that is formed by three straight lines that connect three non-collinear points. These three lines are called the sides of the triangle, and the points where the sides meet are called the vertices of the triangle.

The following formula provides the area of a triangle:

Area = (1/2) x base x height

We are given that the height of the triangle is half of 28 yards, which is:

height = 1/2 x 28 = 14 yards

We are also given that the area of the triangle is 56 square yards. Substituting these values into the formula for the area, we get:

56 = (1/2) x base x 14

Simplifying this equation, we get:

56 = 7 x base

Dividing both sides by 7, we get:

base = 8

Therefore, the length of the base of the triangle is 8 yards.

The vertices are typically denoted by letters, such as A, B, and C. The three angles formed by the sides are also part of the triangle.

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Answer:

\(3 \sqrt{12}

3 Square root of (4×3)

3square root of (2²×3)

(3×2)Square root of 3

=6 square root 3

The graph of the function \(f(x) = (9/4)x^2\) is a symmetric upward-opening parabola.

Overall, the graph represents a quadratic function with a positive leading coefficient, resulting in an upward-opening parabolic curve. The graph has been attached.

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