Fill in the blanks and the graph

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

What is the solution for 6 - 7/8? explain the steps.

Solve the system of equations. x=-2y+1 and x+2y=9. show work