To solve the system of equations below, maria isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 3y=12x {x^2+y=18 a. x^2 + x = 18 b. x^2 − 4x = 18 c. x^2 + 4 = 18 d. x^2 + 4x = 18

D.

Step-by-step explanation:

To solve the system of equations below, Maria isolated the variable y in the first equation and then substituted it into the second equation.

First equation is

To isolate y we divide both sides by 3

Now substitute 4x for y in second equation

this equation is in option D

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.