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Mathematics

3 February, 14:40

Brenda needs $40 to buy a large box of chocolate. She has saved $12 and plans to work as a babysitter to earn $7 per hour. Which inequality shows the minimum number of hours, n, that Brenda should work as a babysitter to earn enough to buy the large box of chocolate? 12 + 7n ≤ 40, so n ≤ 4 7n ≤ 40 + 12, so n ≤ 7.4 12 + 7n ≥ 40, so n ≥ 4 7n ≥ 40 + 12, so n ≥ 7.4