I don’t know the answer for this

Find the values of y: 3y^3(y^2+ 2/3y)=0

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance