Homework Help: Pre-algebra

Posted by rosalind on Wednesday, November 2, 2011 at 12:09am.

Jack runs 275 miles per day during soccer season. He has already run 25 miles this morning. He plans to run 2.5 miles each day. What is the fewest number of days he will need to reach his goal?

Pre-algebra - Steve, Wednesday, November 2, 2011 at 11:36am
in n days, he runs 2.5n miles
he has already run 25 miles

so, after n more days, he will have run

25 + 2.5n miles

If that totals 275 moles, then

25 + 2.5n = 275
2.5n = 250
n = 100

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