Find each missing length

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

What numbers are included in the set of integers? what numbers are not included?

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