Can somebody help me with this?

Which equation can be simplified to find the inverse of y = 2x2?

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

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