Please help I don’t get it

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?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

Which of the following is an irrational number