SOLUTION: The brands are moving across the country, mr brand leaves 3.5 hours before mrs brand. if he average 80 mph and she average 90 mph, how long will it take mrs brand to over take mr b

Question 897609: The brands are moving across the country, mr brand leaves 3.5 hours before mrs brand. if he average 80 mph and she average 90 mph, how long will it take mrs brand to over take mr brand?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
The brands are moving across the country, mr brand leaves 3.5 hours before mrs brand. if he average 80 mph and she average 90 mph, how long will it take mrs brand to over take mr brand?
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let x=amt of time mrs brand overtakes mr brand
distance=speed*travel time (same for both drivers)
80(3.5+x)=90x
280+80x=90x
10x=280
x=28
how long will it take mrs brand to over take mr brand? 28 hrs
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