56. a rectangular frame of uniform depth for a shadow box is to be made from a 36-in. piece of wood.
36 in.
a. write a function to represent the display area in terms of x.
b. what dimensions should be used to maximize the display area?
c. what is the maximum area?

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15