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Reebear8372
09.07.2019 •
Mathematics
Two mechanics worked on a car. the first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. together they charged a total of $1575. what was the rate charged per hour by each mechanic if the sum of the two rates was $155 per hour?
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Ответ:
Two mechanics worked on a car.
Now, mechanic 1 has spent 5 hours working on the car.
Mechanic 2 has spent 15 hours working on the car.
Lets say mechanic 1 charged 'x' dollars per hour and mechanic 2 charged 'y' dollars per hour.
So,
And,
Using the two equations we can solve for 'x' and 'y', using our first equation we get:
On solving for 'x' and 'y' we get:
and putting the value of 'y' in the equation 2 we get:
As mentioned earlier, 'x' represents the charge that mechanic 1 charged per hour and 'y' represents the charge that mechanic 2 charged per hour.
We have
and
.
So, the mechanic 1 charged $75 per hour and mechanic 2 charged $80 per hour.
Ответ:
Step-by-step explanation:
division by 0 is not defined.