Marco collects money that has spilled from a truck. He collects $180 in twenty-dollar and five- dollar bills. If Marco collects twice as many five-dollar bills as twenty-dollar bills, how many
twenty-dollar bills does Marco collect?

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.

22

step-by-step explanation: