What is the value of x

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

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

Which graph represents the linear function below? y-3=1/2(x+2)