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NikAS [45]
3 years ago
12

One morning, justin drove 2 hours before stopping to eat lunch at pizza hut. after lunch, he increased his speed by 10 mph. if h

e completed a 330-mile trip in 5 hours of driving time, how fast did he drive in the morning?
Mathematics
1 answer:
AnnZ [28]3 years ago
6 0
Speed can be broken down to distance / time.
If we know Justin drive for 2 hours before lunch and his trip was 5 hours total, then we know he drove for 3 hours at the increased speed.
2 hours * the original speed will give us the distance traveled before lunch, and 3 hours * the increased speed will give us the distance traveled after lunch. The sum of these distances is 330 miles.

2x + 3(x + 10) = 330
5x = 300
The original speed was 60 mph.
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