Please help me out with this question.

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

If a is a nonzero real number then the reciprocal of a is

3x + 4y = 5 x- 3y = -7 solve by substitution