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2 years ago

13

Attendances at a high school's basketball games were recorded and found to have a sample mean and variance of 470 and 16, respec

tively. Calculate
x ± s,

x ± 2s,
and
x ± 3s.

1 answer:

yanalaym [24]2 years ago

5 0

Answer:

for the second question u have asked

Step-by-step explanation:

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Somebody please help this is confuzaling

Fittoniya [83]

Answer:

(-8, 7)

Step-by-step explanation:

Imagine it as a mirror. That helped me to understand that!

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3 years ago

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The length of a rectangle is 5 yd less than three times the width, and the area of the rectangle is 28 yd2 . find the dimensions

Firdavs [7]

The answer is 4.

The formula for the area of a rectangle is A = lw. Substitute, so then it's 28 = (3x-5) * x, and you evaluate.

Hope this helps you! And rate so I can see if I did well!

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3 years ago

The length of ZX is 2 units. What is the perimeter of triangle XYZ?

dezoksy [38]

Keywords

triangle,perimeter,distance, length, side, points

we know that

The <u>perimeter</u> of a<u> triangle</u> is the sum of the three <u>length</u> <u>side</u>

To find the<u> length</u> <u>side</u> calculate the <u>distance</u> between two <u>points</u>

The formula to calculate the <u>distance</u> between to <u>points</u> is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

Step 1

Find the <u>distance</u> ZY

$Z(1,0)\\Y(3,1)$

substitute the values

$d=\sqrt{(1-0)^{2}+(3-1)^{2}}$

$dZY=\sqrt{5}\ units$

Step 2

Find the <u>distance</u> XY

$X(-1,4)\\Y(3,1)$

substitute the values

$d=\sqrt{(1-4)^{2}+(3+1)^{2}}$

$dXY=\sqrt{25}=5\ units$

Step 3

Find the <u>perimeter</u> of the <u>triangle</u>

$P=ZX+ZY+XY$

we have

$dZX=2\sqrt{5}\ units$

$dZY=\sqrt{5}\ units$

$dXY=5\ units$

Substitute

$P=(2\sqrt{5}+\sqrt{5}+5)\ units$

therefore

the answer is

$P=(3\sqrt{5}+5)\ units$

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3 years ago

Read 2 more answers

HELP ASAP PLEASEEEEEE

xz_007 [3.2K]

Supplementary and adjacent are the two correct choices.

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3 years ago

The measure of angle 4 is 45. If angle 4 is congruent to angle 1, what is the measure of angle 5?

mr_godi [17]

The answer is A) 45°. This is because angles 1 and 5 are vertical angles. Vertical angles are congruent.

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3 years ago