For what values of a and b is the line 2x + y = b tangent to the parabola y = ax2 when x = 3?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36