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denis23 [38]
3 years ago
5

Please help me!!! U will be named the brainliest.

Mathematics
2 answers:
fgiga [73]3 years ago
8 0

Answer:

perimeter = 44.05 yd

area = 164.25 yd^2

Step-by-step explanation:

The figure is shaped like a trapezoid with a semicircle.

Perimeter:

We add the lengths of the three sides of the trapezoid and the circumference of the semicircle.

perimeter = 15 + 11.2 + 10 + 0.5 * 3.14 * 5

perimeter = 44.05 yd

Area:

We find the area of the trapezoid and add to it the area of the half circle.

area = 0.5(10)(10 + 15) + 0.5(3.14)(5^2)

area = 164.25 yd^2

andrey2020 [161]3 years ago
5 0

19a. Well, we can start off by finding the perimeter of the quadrilateral and then move on to the semi-circle. We know that the radius of the semi-circle is 5, right? Therefore, we can also say that the diameter is 10, since 5*2 is 10.

Sides of the quadrilateral: 11.2, 10, 15, 10

Add them all up:

11.2+10+15+10 = 46.2

Now for the semicircle.

The perimeter of a normal is 2πr right? Essentially, we just need to change that formula up a bit so it looks like this:

<u>πr + d</u>

It may seem a bit confusing, but you can't just divide the normal equation by 2. You have to "walk" across the semi-circle, too! This means that we also have to add the diameter. (We already know it's 10, because of the first question)

So, input all the terms:

π(5) + 10 = 25.7079 (I don't know how specific it has to be)

Add the perimeter of the quad and the semi-circle:

25.7079+46.2 = <u>71.9079 yards</u>

<u></u>

19b. First, let's find the area of the quad.

The quadrilateral is essentially a triangle and a square shoved togther, so let's split the quadrilateral up and combine the areas later.

15-10 = 5, right? This means that the height of the triangle will be 5, and the width will be 10 (diameter of the circle!)

1/2*5*10 = 25 yd^2

Now for the square:

The width and the length are both ten. 10*10 = 100 yd^2

100 + 25 = 125 yd^2

Now for the semi-circle (Almost done!)

The formula for the area of a circle is πr^2, so we just have to divide it by 2 (no need to add the diameter, we don't have to "walk" along it)

The new formula we get it πr^2/2

Input values:

π*5^2/2 = 25π/2 = 39.2699

Add all the values:

125 + 39.2699 = 164.2699 yds^2

TLDR;

Perimeter = <u>71.9079 yards</u>

Area = 164.2699 yds^2

Good luck!!

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Vesnalui [34]

Answer:

The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.308.

The expected numbers of voters who would vote for Brown is 3604.

Step-by-step explanation:

The sample statistic is a numerical quantity used to represent a characteristic of a sample. For example, sample mean is a sample statistic representing the average of the sample. Or, sample proportion is a sample statistic representing the proportion of a particular variable in the sample. Or sample variance is a sample statistic representing the variance of the sample.

The sample statistic can be used to estimate the population parameter.

They are known as the point estimate of the parameter.

The sample proportion of a variable <em>X</em> is given by:

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Compute the sample statistic for the proportion of voters surveyed who said they'd vote for Brown as follows:

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Thus, the sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.308.

Compute the expected number of people of the 11700 registered voters who would vote for Brown as follows:

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Thus, the expected numbers of voters who would vote for Brown is 3604.

6 0
3 years ago
What is the graph of the linear function that is represented by the equation y= 1/2x-2
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Answer:

See picture attached.

Step-by-step explanation:

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Answer:

The correct answer would be 7. Explaination below

Step-by-step explanation:

8 + 7 = 15

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