9x^4+2x^2y^2+y^4

Please help me with it​

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

Find two consexutive odd integers such that the sum of their square is 650

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction