Posted by Urgent on Tuesday, January 14, 2014 at 6:18pm.
Briana can row 4 miles per hour is still water. It takes as long to row 8 miles upstream as 24 miles downstream. How fast is the current?

Algebra  Damon, Tuesday, January 14, 2014 at 6:23pm
speed of current = u
speed upstream = (u4)
speed downstream = (u+4)
8 = (u4) T so T = 8/(u4)
24 = (u+4) T so T = 24/(u+4)
8/(u4) = 24/(u+4)
24(u4) = 8 (u+4)
24 u  96 = 8 u + 32
16 u = 128
u = 8

Algebra  Urgent, Tuesday, January 14, 2014 at 6:34pm
How did you do 8/(u4) which turned in to 8(u4)
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