Write the expression 5x(x + 9) - 7(x + 9) in complete factored form.
a. (x + 9)(x + 9)
b. (5x - 7)(x+9)
c. (5x – 7)(x + 9)(x + 9)
d. (5x2 + - 63)

B. (5x - 7)(x+9)

Step-by-step explanation:

5x(x + 9) - 7(x + 9

Factor out the quantity (x+9)

(x+9) (5x-7)

Rearrange the order

(5x - 7)(x+9)

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

the correct answer is the second option