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Genrish500 [490]

4 years ago

13

Two mechanics worked on a car. The first mechanic charged $85 per hour, and the second mechanic charged $80 per hour. The mechan

ic worked for a combined total of 25 hours, and together they charged a total of $2100. How long each mechanic work ?

1 answer:

igor_vitrenko [27]4 years ago

4 0

Answer: 13 and 12

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

We are given that

$v^2-15=-2v$

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Using addition property of equality

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Substitute each factor equal to 0

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$v=-5$ and $v=3$

Hence, two solutions of quadratic equation are

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