Verified Answer :

codymilner

Simple, they're driving 50 miles per hour. So the final day, they drove 150 miles.

andres2003

This is what I know:
\(300:6\) (first day)
\(250:5\) (second day)
\(?:3\) (Third day)
To get the unit rate, divide the first ratio(300 by 6), which is 50.
The unit rate is 50
Then: Multiply the unit rate by 3. 
\(50*3=150\)
Therefore, Evan's family drove 150 miles in 3 hours

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