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Klio2033 [76]
2 years ago
13

I will mark you brainliest!!!! Which ordered pair is the best approximation of the solution?

Mathematics
1 answer:
Ulleksa [173]2 years ago
5 0

Answer:

D

Step-by-step explanation:

We can substitute y = 2x + 1 in the second equation

2x + 1 = -7x + 8

Add 7x to both sides

9x + 1 = 8

Subtact 1 from both sides

9x = 7

x = 7/9

Substituing x in the first equation

y = 14/9 + 1

x rounds to 0.8

y rounds to 2.5

 

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Answer:

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Step-by-step explanation:

Okay, the good news is, this problem is about finding how much you make in an hour.

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and

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In the first equation, divide both sides by 8 to isolate the x.

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In the second equation, divide both sides by 9 to isolate the x.

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This means that Zainab would make more per hour, and to find the second part of the question for a 10 hour job,

(<u>You can multiply any number by 10 easily by moving each number up one place. Hundreds go to the thousands when you multiply by 10 as an example. In this problem, 5.50 times 10 would be $55.00 because the 5 behind the decimal would be moved up infront of the decimal)</u>

<u>Zainab would make $55 for 10 hours</u>

<u>Keziah would make $52.50 for 10 hours</u>

<u>Then, take the difference of those final totals, which is $2.50, or multiply $0.25 by 10 to get $2.50</u>

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