1/2x plus 12 = 8x Please help me!

For which pair of functions is (gof)(a)=|a|-2?

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30