Here's the question you clicked on:
rach552
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?
At first, he's typing 5850/90 = 65 words per minute
Bump this up by 5 wpm to get 65+5 = 70 words per min
Now solve this equation 10500 = 70t for t