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10 July, 03:47

Problem: Tina bought some nail polish and lip gloss at the store. The nail polish cost $4.50 per bottle and lip gloss cost $7 per tube. Tina bought 9 items and spent $50.50. How many of each item did she buy?

Use this 4-step plan to answer the problem above!

Step 1: Understand. What are the facts? What are you asked to find? Is there any information you will not use?

Step 2: Plan: How will you solve this problem? State which strategy you are choosing to use.

Step 3: Solve. Show your steps. What is the solution?

Step 4: Check: Also include your check. Does your answer make sense?

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Answers (2)
  1. 10 July, 07:21
    0
    4.50x + 7x = $50.50

    you will use Guess and check as a strategy

    4.50 (5) + 7 (4) = 50.50

    yes the answer does make sense
  2. 10 July, 07:21
    0
    a - number of nail polish bottles

    b - number of lip gloss tubes

    a+b=9 = > b=9-a

    4.50*a+7*b=50.50

    4.50*a+7 * (9-a) = 50.50

    4.50*a+63-7a=50.50

    63-50.50=7a-4.50a

    2.50a=12.50

    a=12.50/2.50

    a=5 nail polish bottles

    b=9-a=9-5

    b=4 lip gloss tubes
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