Answer:
i think its -4
Step-by-step explanation:
Simplifying
-20x2 = 36x
Solving
-20x2 = 36x
Solving for variable 'x'.
Reorder the terms:
-36x + -20x2 = 36x + -36x
Combine like terms: 36x + -36x = 0
-36x + -20x2 = 0
Factor out the Greatest Common Factor (GCF), '-4x'.
-4x(9 + 5x) = 0
-4.
Answer:

Step-by-step explanation:
Invert and multiply the way you would any fraction division problem. Then cancel common factors from numerator and denominator.

V=763.02
If rounded to the nearest tenth V=763
The answer is the 3rd option
30-60-90 triangle for reference
Remember soh cah toa
O:opposite, a:adjacent, h:hypotenuse
S:sin c:cosine t:tangent
Hope this helped :)