What are the factors for the number 81

Solve the system of equations. y= 2x y= x^2 - 15

Match each statement with its corresponding value for the system below: y = -2(3)x and y = 9x - 2 1. the number of points of intersection. -2 2. the x-coordinate of the solution. 1 3. the y-coordinate of the solution. 0

Is it greater than or less than7*3_9*2