Answer:
<u>Trigonometric ratios</u>

where:
is the angle- O is the side opposite the angle
- A is the side adjacent the angle
- H is the hypotenuse (the side opposite the right angle)
To find sin x and cos y, we must first find the length of the <u>hypotenuse</u> (PO) of the given right triangle.
To do this, use <u>Pythagoras' Theorem:</u>

Given:




Using the found value of the hypotenuse and the trig ratios quoted above:


Therefore, 
Convert meters into cm. 90m=900cm, then multiply that by 712 since 1cm=712m. 900*712=640,800m. hope this helps :)
Only -3 satisfies this equation. so i think it has only one solution! hope it will help you..
Answer:
D.
Step-by-step explanation:
The problem is asking to multiply x-5 by x^2, so we can set it up to distribute the x^2 to both values. The final answer would therefore be x^2(x-5), which is D.