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30 December, 01:47

3. Juanita wants to buy a computer. She needs to earn at least 400 dollars. If she makes 9

dollars an hour and has already saved 40 dollars, how many hours does she need to

work?

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Answers (1)
  1. 30 December, 03:14
    0
    40 hours

    Step-by-step explanation:

    9x + 40 = 400 (with x being how many hours she has worked). We get rid of the 40 on both sides by subtraction. Our new equation is 9x = 360. Now we divide 9 on both sides and we learn that x = 40.
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