Aboat takes 4 hours to go 20 miles upstream. it can go 32 miles downstream in same time. find the rate of the current and the rate of the boat in still water.

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

3. solve the given inequality and graph the solution on a number line.

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k