X - y = 3

a. work out the value of 5(x-y)

b. work out the value of 2x - 2y

c. work out the value of y - 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

Solve the inequality and graph 6j - 7 < 5

Use circumcenter theorem to solve for the given values