Please help me with these questions and show your work so that I can understand thank you!

Algebra IIA Final Exam Review 15. Write a system of equations using the graph below? 16. Write the matrix equation used to solve the system: 3x + 2y - z =7 -2x -y + 2z=6 x +2y - 42 =8 17. Solve the inequality. x + 22 2 - 3x - 10 18. The theater club is selling tickets to their production of Attack of the Pom Pom Zombies. They are selling adult tickets for $8 and student tickets for $4. They sold 220 tickets and made $1600. Write a system of equations that can be used to find a, the number of adult tickets sold, and s, the number of student tickets sold? Determine how many adult tickets and how many student tickets were sold.35. Find the value of k so that the line through the given point has the given slope (0, k) and (3, 4); m = 2 Slope: m = 2 y1 X2 - X1 36. Write the equation of the line that passes through the given point and has the given slope. Point : ( 2 , - 4 ) ; m = Now Point-Slope Form: y - y1 = m(x - x1) 37. A&B's wireless normally charges an installation fee of $120 plus $80 a month for service. For their big semiannual sale, they are reducing the monthly service fee to $60. What would happen to the graph of the line representing the situation? 17