If B =x²-7x + 4 and C=
x-9 find an expression that equals B+2C in stadard form.

x²-5x-14

Step-by-step explanation:

(x²-7x+4)+2(x-9)

combine like terms and distribute

x²-7x+4+2x-18

x²-5x-14

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.