Find the probability that x = 2

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2