3 years ago

What is the x-value of the solution to this system of equations?

1 answer:

4 0

Plug in for x.

7(2y - 4) + 5y = -66

14y - 28 + 5y = -66

19y - 28 = -66

19y = -38

y = -2

Put it back into the equation.
2(-2) - 4 = -8
x = -8

The x-value is x = -8

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5 0

3 years ago

Christine went shopping and bought each of her eighteight nephews a gift, either a video costing $14.95 or a CD costing $16.8

pogonyaev

So I think you should set up an equation like this: 14.95x+16.88y=131.18 , x+y=8

so x=8-y, plug this into the original equation:
14.95(8-y)+16.88y=131.18
Evaluate: 119.60-14.95y+16.88y=131.18
Combine like terms: 119.60+1.93y=131.18
Subtract 119.60 from both sides. You get: 1.93y=11.58
Divide both sides by 1.93. You get y=6

Plug into second equation: x+y=8 ---> x+6=8 and solve for x. x=2

Christine bought 2 video games and 6 CDs. 14.95(2)+16.88(6)=131.18

4 0

4 years ago

Jake mowed 216 sq.yd. of lawn in 3 hr. Ricky mowed 108 sq.yd. of lawn in 2 hr.

algol13

Answer:

108 Square Yards

2 Hours

Step-by-step explanation:

<h2><u>PLEASE MARK BRAINLIEST</u></h2>

All you do is look at the question and it says he mowed 108 square yards in 2 hours.

8 0

3 years ago