Answer:
(x, y) = (- 3, 4)
Step-by-step explanation:
Given the 2 equations
5x + 2y = - 7 → (1)
4x - y = - 16 → (2)
multiply all terms in (2) by 2
8x - 2y = - 32 → (3)
Add (1) and (3) term by term
(5x + 8x) + (2y - 2y) = (- 7 - 32)
13x = - 39 ( divide both sides by 13 )
x = - 3
Substitute x = - 3 into either (1) or (2) and solve for y
substituting in (1) gives
(5 × - 3) + 2y = - 7
- 15 + 2y = - 7 ( add 15 to both sides )
2y = 8 ( divide both sides by 2 )
y = 4
solution is (- 3, 4 )
The answer is answer choice 3
Let M equals to Mario's weight (M = Mario’s weight) then formulate an equation from the given phrase: "Victoria weighs 5/7 as much as Mario. Victoria weighs 125 lb", so the equation would be: 125 lb = (5/7) M. To solve for M, multiply both sides by 7, then it will result to 875 = 5M then finally, divide both sides by 5 to get Mario’s weight which is equals to 175 lbs.
I would say it's the one you have checked off on the paper.
Answer:
mAC = 30*
Step-by-step explanation:
