Which graph represents a function?

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?