Which of the following is the standard deviation of the random variable x, the number that appears on a die, if the probability of any number on a fair, 9-sided die is 1/9? a.2.582 b.2.739 c.0.11 d.4.5

Answer with explanation:

When a dice with 9 faces are rolled total possible outcome =9

→x={1,2,3,4,5,6,7,8,9}

Probability of getting any number from 1 to 9 , when the die is rolled once

Standard Deviation

Option A→2.582          

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: