F(X) = 4x - 5
G(X) = 6x - 3
F(x) - G(x)
(4x - 5) - (6x - 3)
4x - 5 - 6x + 3
-2x - 2
-2(X + 1).
I believe this would be the simplified solution.
So, 10 x 10 is 100, x 8 is 800, your answer is D.
Formula for a cylinder = pi x r^2 x h
I multiplied 48 times 15 percent which comes to 7.20
7.20 plus 48 equals 55.20