Which expression uses the commutative property to make it easier to evaluate 1/6 • 5/7 • 18?
1 answer:
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Answer:
The original price is $90.
Step-by-step explanation:
100% - 40% = 60%
y × 60 = 54 × 100
60y = 5400
60y ÷ 60 = 5400 ÷ 60
y = 90