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Morgarella [4.7K]
2 years ago
7

Solve using substitution. y = –1 2x − y = –1

Mathematics
2 answers:
irakobra [83]2 years ago
8 0
X =1 I had this question
stiv31 [10]2 years ago
5 0

ANSWER: Given the system of equations, the valid answers are:

x = -1

y = -1

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On Monday, it took 5 builders 3 in a half hours to build a wall.
mrs_skeptik [129]

Answer:

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Step-by-step explanation:

→ First step is to find the amount of hours it takes for one builder

We know it takes 5 builders 3\frac{1}{2} hours so 1 builder would take 5 × 3\frac{1}{2} which is \frac{35}{2} hours so it takes one builder 17.5 hours to builder a wall

→ Now we know how long one work takes we need to find out the time for 2 builders

1 builder = 17.5 hours

2 builders = 17.5 ÷ 2 = 8.75 hours

So 2 builders take 8.75 hours

→ We know that each builder is paid £9.30 for each or part hour they work so

9.30 hourly pay rate × 9 hours work of work = £83.70

Each worker will be paid £83.70

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2 years ago
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Alika [10]
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3 years ago
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Vedmedyk [2.9K]
All of them are the correct answer.
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3 years ago
Please help me I don't know how to do these at all.
Arlecino [84]

Answer:

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Step-by-step explanation:

Look to the attached file

Download docx
3 0
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