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November 27, 2014

November 27, 2014

Posted by **ashley** on Wednesday, April 21, 2010 at 9:29pm.

- algebra -
**Reiny**, Wednesday, April 21, 2010 at 9:42pmrate = distance / time

= 420/8 = 52.5 mph

so any speed greater than that will give a distance greater than 420

so

rate ≥ 420/8 would do it.

- algebra -
**Mrs P**, Wednesday, April 21, 2010 at 9:47pm8x ≥ 420

8x/8 ≥ 420/8

x ≥ 52.5

They would need to travel greater than or equal to 52.5 mpg to meet their expectations.

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