How to solve the linear systems by graphing y = 5 x= -2

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

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?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?