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wlad13 [49]
3 years ago
12

Solve the system of equations below by elimination. -2x-4y=-4 -x+7y=-20

Mathematics
1 answer:
Alik [6]3 years ago
5 0

Answer:

67

Step-by-step explanation:

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Help could you explain step by step?
mel-nik [20]

Answer:

x = 2 , y = 11

Step-by-step explanation:

the diagonals of a parallelogram bisect each other , then

PT = TR , that is

y = 5x + 1 → (1)

QT = TS , that is

2y = 6x + 10 → (2)

substitute y = 5x + 1 into (2)

2(5x + 1) = 6x + 10

10x + 2 = 6x + 10 ( subtract 6x from both sides )

4x + 2 = 10 ( subtract 2 from both sides )

4x = 8 ( divide both sides by 4 )

x = 2

substitute x = 2 into either of the 2 equations for corresponding value of y

substituting into (1)

y = 5(2) + 1 = 10 + 1 = 11

6 0
1 year ago
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A bag contains green tokens and black tokens. There are 24 green tokens in the bag. The ratio of green tokens to black tokens is
AURORKA [14]

I uploaded the answer to a file hosting. Here's link:

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8 0
2 years ago
Adam was going to sell all of his stamp collection to buy a video game. After selling half of them he changed his mind and did n
Roman55 [17]
He would have 21 before he bought the 10 stamp because 31-10=21
6 0
3 years ago
I swear I'm not dumb I just cbf rn. I feel like sleeping can someone help?? ​
Trava [24]
D- 3.9, 3.6, 3.3
F- 25/35, 31/35, 36/35 or 1 and 1/35
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2 years ago
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you are working to save money for a trip you need to save at least 1000 dollars if you already have 350 saved and you make $8 an
4vir4ik [10]
$1000 dollars is how much you need to pay for the trip.
You already have $350.
$1000 - $350 = $650.  So, you need to make $650 more.
$650 <span>÷ 8 = 81.25

So you final answer is:  81.25 hours.

Hope this helped you!  :D





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8 0
3 years ago
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