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Lana71 [14]
2 years ago
11

Two mechanics worked on a car. The first mechanic worked for

Mathematics
2 answers:
ivann1987 [24]2 years ago
5 0
20x + 15y = 2000
x + y = 115
55+60=115

20 (55) + 15 (60)=2000
1100+900=2000
2000=2000
Ira Lisetskai [31]2 years ago
4 0

x=price per hour for first mechanic

y=price per hour for second mechanic


20x+15y=2000

x+y=115

solve

divide first equation by 5

4x+3y=400


multiply second equation by -3 and add to second


4x+3y=400
<u>-3x-3y=-345 +</u>
1x+0y=55

x=55


x+y=115

55+y=115

minus 55

y=60


first mechanic rage is $55 per hour

second mechanic is $60 per hour


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\large\boxed{x\in[-5,\ \infty)}

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8 0
3 years ago
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Let,

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She swims 12 laps on Monday.

Keywords: addition, division

Learn more about division at:

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Answer:

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