Pleas yall help ill give 20 points

b) x=-2

Step-by-step explanation:

2(x+2)-4x =8

2x+4-4x

-2x+4 = 8

    -4   -4

-2x = 4

(divide both sides by -2)

x=-2

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify