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Alexandra [31]
3 years ago
8

Ling lives 2 miles from school. It took him 15 minutes to bike from school to home. The first half of the distance he biked at a

speed of 12 mph. What was his speed for the remaining distance? What was his average speed?
Mathematics
2 answers:
kodGreya [7K]3 years ago
8 0
He was going 6 mph for the remaining distance 
the average is 9
lisov135 [29]3 years ago
5 0
1 mile at 12 m/h is .2 m/min
1 mile at .2 m/min (1/.2) = 5 min So the first mile took 5 minutes
To find how fast the second mile was:
You know it was 1 mile and it took 10 minutes
1/10=.1 m/min which is 6 m/h
The average speed is 6+12/2=9 m/h

Hope that helps.  Feel free to ask any questions.
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3 years ago
You have been assigned a nine-digit identification number.
garik1379 [7]

Answer:

Step-by-step explanation:

A tree diagram? I don't think so. Probably it would take a year's supply of paper to record all the possibilities. The question really is do you allow duplications and is 0 allowed to be the first digit.

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pochemuha

Answer:

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Area: 2x²+8x

Step-by-step explanation:

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