MATH

Joaquin buys 3 packs light bulbs. Each pack contains 12 light bulbs. After changing the bulbs in his house, he has 15 bulbs left. How many light bulbs did he use?

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  1. I'll be glad to check your answer.

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    Ms. Sue
  2. kthanks i think its 21 is that true if not tell me what did i do wrong

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  3. ms sue u there???? well -____- i guess not

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  4. Sorry -- I was busy answering your other question.

    Yes, he used 21 bulbs.

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    Ms. Sue
  5. thank u

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  6. You're welcome.

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    Ms. Sue

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