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?

Question

Kaitlyn Heath

Mathematics

30 January, 05:56

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?

+4

Answers (2)

Know the Answer?

Elf · Answer 1

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

Barbara Solomon · Answer 2

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