Four friends all give each other presents. The total cost of the presents is £80.52
Work out the mean cost of a present in pounds (£).

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.

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative