What is 5 1/2 - 3 9/10

8/5 or 1.6

Step-by-step explanation:

1) 5 1/2 or 11/2 is equal to 55/10. 2*5 is 10 as the denominator. 11*5 is 55 as the numerator.

2) Make 3 9/10 into improper fraction to get 39/10.

3) Subtract: 55/10 - 39/10 = 16/10.

4) Simplify: 16/10 simplifies to 8/5 or as a decimal 1.6.

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.

it is probably the graph on the bottom right.