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An athlete can run 6 miles in 51 minutes. At this rate, how many miles could the athlete run in 90 minutes

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Answer: 9,9 miles.

Step-by-step explanation: if he can run 6 miles in 51 minutes, he's running 0,11 miles per minute (calculation down below), therefore in 90 minutes he could run 9,9 miles (0,11.90).

6 mi --- 51

x ---- 1

cross multiplication,

51x = 6

x=6/51

x=0,11

If he runs 0,11 miles in 1 minute, in 90 minutes he'll do

0,11 --- 1

x ---- 90

x= 0,11 . 90

x= 9,9

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