Assume that random guesses are made for 8 multiple choice questions on an SAT test, so that there are n=8 trials, each with probability of success (correct) given by p=0.65. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4 .

angle addition postulate

2x=56

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.

m

step-by-step explanation: