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bellanova
A small boat travels 12mph in still water. It takes 4hrs longer to travel 45 miles going upstream than downstream. Find the rate of the current. (Hint: 12+x= rate going down; 12-x= rate going up) round answer to nearest tenth. *I know you have to use the quadratic formula at some point but thats about it.
http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq?hide_answers=1&beginning=2430 this may help some
Teacher sounds like someone who gives students partial answers on the test
t=d/r The difference between the time up and the time down is 4 hours. Solve the following for c, the speed of the current: \[\frac{45}{12-c}-\frac{45}{12+c}= 4\]