Question

A mechanic charges a $30 flat rate plus $20 per hour. If he wants to earn at least $350 this week, how many hours will he need to work?​

Answer 1

Answer
16 hours


Step-by-step explanation:

Answer 2

16 hours

Step-by-step explanation:

Let the mechanic works for x hours to make a money of $350.

Fixed charges = $30

Charges per hour = $20

So, charges for x hours = $20x

Total money earned = $350

`\implies \: 20x + 30 = 350 \\ \\ \implies \: 20x = 350 - 30 \\ \\ \implies \: 20x = 320 \\ \\ \implies \: x = (320)/(20) \\ \\ \implies \: x = 16 \: hours`

Thus, the mechanic needs to work for 16 hours to make $350.