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Alona [7]
3 years ago
11

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

s worked for a combined Total of 20 hours and together they charged a total of $1675. How long did each mechanic work?
Mathematics
1 answer:
Firlakuza [10]3 years ago
5 0

Answer:

Correct answer: First x = 15 h and second y = 5 h

Step-by-step explanation:

To solve this problem we will form a system of two equations with two variables:

Let be the time of the first mechanic x  and of the second y

x + y = 20  ⇒ y = 20 - x

85 x + 80 y = 1675

85 x + 80 (20 - x) = 1675

85 x + 1600 - 80 x = 1675

5 x = 1675 - 1600

5 x = 75

x = 75 / 5 = 15 h

x = 15 h

y = 20 - 15 = 5 h

y = 5 h

God is with you!!!

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I believe it is 4.5mph because traveling upstream and the stream moves at a speed of 4mph would knock off 4 of the original number so if you add 4miles to the given 5 miles you get 9

The same is with the boat going downstream it is adding 4 miles to the original number so you subtract 13 and 4 and you get 9

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7 0
3 years ago
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3 years ago
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3 years ago
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Annette [7]

Answer:

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Step-by-step explanation:

Area of trapezoid ABCD

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Answer:

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Step-by-step explanation:

the motion of a body is as a result of the various forces acting on it.

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