Solve the system of equations and choose the correct answer from the list of options.
x – y = 7
y = 3x + 12

x=-9.5

y=-16.5

Step-by-step explanation:

Hi, to solve this problem we have to apply the substitution method:

x-y =7 (a)

y=3x+12(b)

Replacing the value of "y" in (a) for (b):

x -(3x+12)=7

x-3x-12=7

x-3x =7+12

-2x =19

x=19/-2

x=-9.5

Replacing the value of "x" in (b)

y=3x+12

y=3(-9.5)+12

y= -28.5+12

y=-16.5

Feel free to ask for more if needed or if you did not understand something.

answerthe vertex form

step-by-step explanation:

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.