Question

Which point is a solution of y = 3x and x + 2y = –21?
Select one:
a. (–3, –9)
b. (–9, –3)
c. (3, –9)
d. (–3, 9)

Answer 1

Put the x and y values into each of the equations and the combination that works is your answer :)

Answer 2

Substitute y=3x into the other equation and solve for x.
x+2(3x)=-21

Answer 3

the anwer is (-3,9)

Answer 4

If that were true, then y=3x => 9=3*(-3) => 9=-9 which isn't true.

Answer 5

Mmm, so

Answer 6

the answer is (-3,-9)