A student takes a 10-question, multiple-choice exam with possible answers as a, b, c, and d for each question and guesses on each question.

(a) Find the probability of guessing 9 out of the 10 correctly. (10-pt)

(b) Find the mean (4-pt)

(c) Find the variance (4-pt)

(d) Find the standard deviation

anser is a

step-by-step explanation:

negitive slope

what graph

step-by-step explanation:

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180

y/x of point b= y/x of point a

step-by-step explanation:

(i got the same question, this was the correct answer.)