Step-by-step explanation: there are 7 days in a week so if he practiced everyday for a week he practiced 3/4 hours for 7 days straight, so 3/4 × 7= 5.25
Let s and c be the rate of the boat in still water and the rate of the current, respectively. Then: 108/s-c=3 108/s+c=2 3s-3c=108 2s+2c=108 Solve for s and c ☺☺☺☺