Standardized Test: You are trying to answer a multiple choice question on a standardized test. There are four choices. If you get the question right, you gain 1
one point, and if you get it wrong, you lose point. Assume you have no idea what the right answer is, so you pick one of the choices at random. What is
the expected value of the number of points you get?
What is the expected value of the number of points you get? Round the answer to two decimal places.
The expected value of the number of points you get is
x
5

f

step-by-step explanation:

f

the thermometer is precise but not accurate

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.