Pls pls pls I need help for 25 and 26 before midnight!!

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.

Sebastian solved the radical equation y + 1 = -2y-3 but did not check his solution. which is the true solution to the radical equation y + 1 =-2y-3 ?

If x varies directly with y and x = 6 when y = 15, find x when y= 20.