Which is the value of this expression when a=5 and k=-2

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Which one is true about the hexagons ?

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