HELP PLEASE!!! What is the solution to the system of equations below? y=1/2x-4 and y=-2x-9 A) (-2,-5) B) (-2,-3) C) (2, -3) D (2,-13) PLEASE HELP THANKS!!

Question

asked Jun 15, 2020 132k views

2 Answers

Justin Talbott · Answer 1 · 2020-06-19T04:48:50+0000

Answer:

(-2,-5)

Explanation:

y=1/2x-4 and y=-2x-9

Just substitute one into the other and then solve for x. Then go back to get y.

1/2x-4=-2x-9

Add 4 on both sides

1/2x =-2x-5

Add 2x on both sides

2.5x=-5

Divide both sides by 2.5

x=-5/(2.5)=-2

Plug into y=-2x-9 to find y.

y=-2(-2)-9=4-9=-5.

Answer (-2,-5)