Help pls what is x

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 value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48