5(20-x)=1/2(4x+4) are you suppose to combine like terms after doing the parentheses? ?

Solve:

5(20-x)=1/2(4x+4)

Distribute 5 to 20 and -x, and 1/2 to 4x and 4

5(20) = 100

5(-x) = -5x

4x/2 = 2x

4/2 = 2

Simplify

-5x + 100 = 2x + 2

Isolate the x. Subtract 2x from both sides, and 100 from both sides

-5x (-2x) + 100 (-100) = 2x (-2x) + 2 (-100)

-5x - 2x = 2 - 100

Simplify

-7x = -98

Isolate the x. Divide -7 from both sides

-7x/-7 = -98/-7

x = -98/-7

x = 14

14 is your answer for x

hope this helps

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j

the answer to the question is punishment. or more specifically, positive punishment.

positive punishment occurs when a behavior is given a negative consequence for the individual doing the behavior.

sara no longer wants to ask questions (the behavior) because she is ridiculed by mr. smith (the punishment).

reinforcement is inaccurate because reinforcement always gives positive consequences for the individual doing the behavior, be it by introducing a pleasant consequence or removing an unpleasant one.