nh0uma4yrlain nh0uma4yrlain

07-07-2016
Mathematics

contestada

A car repair shop charged $80 per hour for labor and $210 for the parts of a car. If the total cost of repair for the car was $490, how many hours did it take to repair the car?. . 0.59. . 2.71. . 3.50. . 8.75 @ikram002p

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meerkat18 meerkat18

13-07-2016

The total cost for the repair is the sum of the wage from the labor which is dependent on time and that of the fixed cost for the parts of the car. Let x be the number of hours,
$210 + ($80)x = $490
The value of x from the equation is x = 3.5. Therefore, it took 3.5 hours to repair the car.

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