Expression equivalent to 7x plus 2x plus 6y

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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?

How can you use synthetic substitution to tell whether a given binomial is a factor of a polynomial?