Determine which ordered pair is a solution of y equals 8x

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

Math question.. plz me .. best answer all

The price of a lawn mower is x dollars. the store is having a 75% end of summer clearance sale. which expression can be used to find the clearance price of the mower? a) .25x b) .75x c) x - .25(75) d) x + .25(75)