X + y = 24
x - y = 2
Adding both equations
2x = 26
x = 13
y = 11
To find the correct answer, you have to simplify the equation.
Multiply -1/2 by everything in the parenthesis.
3/4x - 3x - 1/2 - 3x. Combine like terms.
-21/4x - 1/2. Turn -21/4x into a mixed number.
-5 1/4x - 1/2.
Your answer is D
Here's the sum of your problem.....
14 x 10,000 = 140,000 + 12,000 = 152,000
Hopefully this answers your question! :D
ANSWER

EXPLANATION
The area of the two tra-pezoidal faces

The area of the 5 by 6.4 rectangular face

The area of the two square faces

The area of the 9 by 5 rectangular face is

The surface area of the design is:

I believe the answer is
f(x)=3x -6
Hope this helped.