Answer:
C. Yes Devon should have evaluated f(3).
Step-by-step explanation:
She substituted the wrong value. For x - 3 to be a factor f(3) must equal 0.
f(3) = 3^3 + 3^2 - 10(3) + 8 = 27 + 9 - 30 + 8
= 14, so x- 3 is not a factor anyway but she did substitute the wrong value.
Answer:
P(x) = 15x^2 + 2x + 4
Step-by-step explanation:
To simplify:
combine like terms
8x^2 + 7x^2 = 15x^2
There are no other like terms.
This equation cannot be simplified any further with the given information.
P(x) = 15x^2 + 2x + 4
Use the PMF for the given distribution:

Then the probability that X = 14 is

9/20 because you can divide them in half but you can divide them any further.