X P(X) 10 0. 2
20 0. 35
30 0. 28
40 0. 17

Find the mean of the above probability distribution. You must show how to calculate this for full credit. Find the standard deviation of the above probability distribution. You must show how to calculate this for full credit.

the answer is c. hope this !

step-by-step explanation:

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

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.