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15y - 9 < 36
15y - 9 + 9 < 36 + 9
15y < 45
15y ÷ 15 < 45 ÷ 15
y < 3
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~Kiwi
12 divided by 30 and you get .4 which is the same as 40%
Answer:
- speed of the first bus: 36 2/3 miles per hour
- speed of the second bus: 73 1/3 miles per hour
Step-by-step explanation:
The second bus travels twice as fast, so will take half the time of the first bus. The second bus takes 3 hours less time, so that is half the time of the first bus.
The first bus's speed is (220 mi)/(6 h) = 36 2/3 mph.
The second bus's speed is twice that: 73 1/3 mph.