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3 years ago

HELP ME PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

vaieri [72.5K]3 years ago

3 0

Answer:

about 3.6364

Step-by-step explanation:

200÷55=3.6364

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Find the circumference and the area of a circle with radius 8 yd.

Bezzdna [24]

Answer:

Area: 200.96yd²

Circumference: 50.24yd

Step-by-step explanation:

See attached image

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3 years ago

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The histograms below show the heights (in meters) of the tallest buildings in China and the United States.

gregori [183]

Answer:

A and B

Step-by-step explanation:

This is correct on khan academy!

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4 years ago

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Triangle X Y Z is shown. Angle X Z Y is a right angle. Angle Z X Y is 60 degrees and angle X Y Z is 30 degrees. The length of hy

vladimir1956 [14]

Answer:

StartFraction StartRoot 3 EndRoot Over 3 EndFraction

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

we know that

In the right triangle XYZ

$cos(Y)=\frac{ZY}{XY}$ ---> adjacent side divided by the hypotenuse

substitute the values

$cos(30\°)=\frac{ZY}{4}$

Remember that

$cos(30\°)=\frac{\sqrt{3}}{2}$

substitute

$\frac{\sqrt{3}}{2}=\frac{ZY}{4}$

$ZY=(4)\frac{\sqrt{3}}{2}$

$ZY=2\sqrt{3}\ units$

step 2

$sin(Y)=\frac{XZ}{XY}$ --> opposite side divided by the hypotenuse

substitute the values

$sin(30\°)=\frac{XZ}{4}$

Remember that

$sin(30\°)=\frac{1}{2}$

$\frac{1}{2}=\frac{XZ}{4}$

$XZ=2\ units$

step 3

$tan(Y)=\frac{XZ}{ZY}$ --> opposite side divided by adjacent side

substitute the values

$tan(Y)=\frac{2}{2\sqrt{3}}$

$tan(Y)=\frac{1}{\sqrt{3}}$

Simplify

$tan(Y)=\frac{\sqrt{3}}{3}$

StartFraction StartRoot 3 EndRoot Over 3 EndFraction

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3 years ago

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Charlene is knitting a baby blanket. She wants its width, w, to be at least half its length, l. She estimates that she has enoug

jolli1 [7]

I believe the answer is C - 60 inches. 60 x 2 = 120, which is both lengths, and since he width is half the length, then 30 x 2 = 60. So 130 (length) + 60 (width) = 180. So 60 inches would be the maximum length for both sides.

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3 years ago

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Factorise 9a^2 - 6ab + 12ac - 8bc

Lady_Fox [76]

9a^2-6ab+12ac-8bc
=3a(3a-2b)+4c(3a-2b)
=(3a+4c)(3a-2b)
There you go. Have fun!

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3 years ago