Can someone help me with this?

See attachment below and find the equivalent of tan(∠qsr)

Melissa is purchasing a $160,000 home and her bank is offering her a 30-year mortgage at a 4.9% interest rate. in order to lower her monthly payment, melissa will make a 20% down payment and will purchase 3 points. what will her monthly mortgage payment be? a. $645.98 b. $650.46 c. $662.93 d. $606.69

Which shaded region is the solution to the system of inequalities? y y[tex]\geq[/tex]-x+1