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

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.

the answer is c hope it

step-by-step explanation: