Math

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17.The speed limit of a highway is 55 miles per hour. A car is traveling at least 65 miles per hour. How many miles per hour m over the speed limit is the car traveling?
55 – m ≥ 65; m ≥ 10
m + 65 ≤ 55; m ≤–10
65 – m ≤ 55; m ≤ 10
55 + m ≥ 65; m ≥ 10****

18. Chris earns $7.00 per hour working on the weekends. He needs at least $210.00 for a new cell phone. How many hours, h, does Chris need to work on the weekends to buy a new phone?
h/7.00 > 210.00; h> 30; 30 hours
h/7.00 < 210.00; h < 30; 30 hours
7.00h≥ 210.00; h≥ 30; 30 hours**
7.00h≤ 210.00; h ≤ 30; 30 hours

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