Help, please. I just need the answer no need to explain.

m=18

Step-by-step explanation:

2=m/2-7

+7      +7

9=m/2

2 * 9=m/2 * 2

18=m

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.