The product of two integers is 72.one number is two less than 5 times the other

x*y=72

x = 5y-2

x=72/y

72/y=5y-2

72=5y^2-2y

5y^2 -2y - 72 = 0

(5y+18)(y-4)=0

y = -18/5 discard

or y = 4

4x=72

x=18

(18,4)

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.

noncoplanar points are points that do not lie on the same line.