This is for a practice problem. I have a answer but I think I missed a step

Assume cd | ab are parallel. find m2. a) x= 50° (b) x = 70° c) x = 30° d) x = 60

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 value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12