20 what are the solutions to the following system of equations? select the correct answer below. y = x2 − 4x + 3 2x + y = 6 a. (−1, 8) and (3, 0) b. (−1, 3) and (8, 0) c. (0, 8) and (3, −1) d. (3, 8) and (−1, 0)

We have one of those equations already solved for y, so let's sub that one into the other one and solve the equation in terms of x only: .  We will simplify that and at the same time bring the 6 over by subtraction to get a polynomial set to equal 0 that we can factor.  .  We will factor that to get (x-3)(x+1) for x values of x = 3 and x = -1.  a above is the choice that has the x values we need, -1 and 3.