All categories

3 years ago

Does anyone know this answer I don’t get it

Mathematics

1 answer:

Svetradugi [14.3K]3 years ago

6 0

Answer:

∠ XYZ ≈ 66.4°

Step-by-step explanation:

Using the cosine ratio in the right triangle

cosY = $\frac{adjacent}{hypotenuse}$ = $\frac{XY}{YZ}$ = $\frac{6}{15}$ , then

∠ Y = $cos^{-1}$ ( $\frac{6}{15}$ ) ≈ 66.4° ( to 1 dec. place )

You might be interested in

Someone please help me

hichkok12 [17]

Answer:

364.8 ft^2.

Step-by-step explanation:

I assume you want the area of the figure.

Total area = area of the top triangle + area of the trapezium

= 1/2 * base * height + 1/2 * height * ( sum of the parallel sides)

= 1/2 * 18 * 6 + (14/2)( 18 + 26.4)

= 54 + 310.8

= 364.8 ft^2.

3 0

3 years ago

What is the volume of a cylinder that is 15-m tall and has a radius of 3 m. Use 3.14 for π, and round your answer to the nearest

Agata [3.3K]

Answer:

D. 424 m³

Step-by-step explanation:

Use the formula for the volume of a cylinder

V = $\pi$ r²h

Plug in the values we know

V = (3.14)(3²)(15)

V = 423.9 m³

This is closest to answer choice D, 424 m³

So, D is correct

7 0

3 years ago

Select a solution for:<br> x^2=81/144

Brilliant_brown [7]

Answer:

x=3/4, -3/4

Step-by-step explanation:

Hello! Thanks for letting me answer your question! If you have any more questions feel free to ask me! If not, Have a WONDERFUL day and Please don't forget to consider making me Brainliest on your question today!

6 0

3 years ago

Which of the following are identities? Check all that apply

Natasha2012 [34]

Answer:

A, C

Step-by-step explanation:

Actually, those questions require us to develop those equations to derive into trigonometrical equations so that we can unveil them or not. Doing it only two alternatives, the other ones will not result in Trigonometrical Identities.

Examining

A) True

$\frac{1-tan^{2}x}{2tanx} =\frac{1}{tan2x} \\ \frac{1-tan^{2}x}{2tanx} =\frac{1}{\frac{2tanx}{1-tan^{2}x}}\\ tan2x=\frac{1-tan^{2}x}{2tanx}$