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3 years ago

Either enter an exact answer in terms of pi or use 3.14 for pi and enter your answer as a decimal

Mathematics

1 answer:

Phantasy [73]3 years ago

4 0

Area of a circle with diameter 14.

That means the radius is r=7 and the area is of course πr²

Answer: 49π

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PLEASE ANSWER ASASP<br> -5y + 4 = -11<br> what is y?

lorasvet [3.4K]

Answer:

Step-by-step explanation:

-5y + 4 = -11 Get rid of the numbers to get y alone.

-5y +4 minus 4 = -11 minus 4 Here you are removing the 4 from the left

-5y = -15 Now you will have to get rid of the -5

-5y/(-5) = -15/(-5)

y = 3

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3 years ago

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Zigmanuir [339]

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3 years ago

What is the value of Y

Keith_Richards [23]

76 degrees. Angle y is supplementary to angle “2x+20”.

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3 years ago

What is the measure of angle J in the triangle? Drawing is not to scale

DaniilM [7]

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3 years ago

The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c)

Ilya [14]

Answer:

$\bar X =\frac{2.3+3.1+2.8+1.7+0.9+4+2.1+1.2+3.6+0.2+2.4+3.2}{12}=2.29$

$s=1.09$

Step-by-step explanation:

For this case we have the following data given:

2.3 3.1 2.8

1.7 0.9 4.0

2.1 1.2 3.6

0.2 2.4 3.2

Since the data are assumedn normally distributed we can find the standard deviation with the following formula:

$\sigma =\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And we need to find the mean first with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X =\frac{2.3+3.1+2.8+1.7+0.9+4+2.1+1.2+3.6+0.2+2.4+3.2}{12}=2.29$

And then we can calculate the deviation and we got:

$s=1.09$

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3 years ago

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