Can someone help please

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

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

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?