1and 3/4 and 1/8 is closest to 0,1,2 or 3

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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?

What are “like terms”? why can we only add like terms?