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Algebra 9 Online
OpenStudy (anonymous):

Michael takes 90 min to type 5850 words. If he increases his typing speed by 5 words/min, how many minutes will he take to type 10,500 words?

jimthompson5910 (jim_thompson5910):

At first, he's typing 5850/90 = 65 words per minute

jimthompson5910 (jim_thompson5910):

Bump this up by 5 wpm to get 65+5 = 70 words per min

jimthompson5910 (jim_thompson5910):

Now solve this equation 10500 = 70t for t

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