Part a
60h ≤ 438
Part b
7.3 hours
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Answer: 5a + 2b
Step-by-step explanation:
She purchased 12a pounds of apples and she used 7a pounds, so that means 12a - 7a = 5a
She purchased 4b pounds of bananas and used 2b pounds, so that means 4b - 2b = 2b
Answer:

Step-by-step explanation:
Four sets of three Squared
To start, you will need to get the set(base number) and get the exponent 3 and put it on the top.

Hope this helps!