Mathematics: Solve |x| 4 a. {-4, 4} b. {x|-4 x 4} c. {x|x -4 or x 4}

Solve |x| 4 a. {-4, 4} b. {x|-4 x 4} c. {x|x -4

krishimotam

10.03.2022

c. {x|x< -4 or x> 4}

Step-by-step explanation:

|x|>4

Absolute values have 2 solutions, one positive and one negative. Remember when taking the negative solution to flip the inequality.

x>+4 x<-4

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cmflores3245

19.02.2022

probability that the child DOES NOT play the piano

$P(E^{-}) =\frac{4}{5}$

Step-by-step explanation:

A students' choir contains 25 children

n(S) =25

The number of students play the piano =5

Let 'E' be the event of the child play the piano so n(E) =5

The probability of that the child play the piano

$P(E) = \frac{n(E)}{n(S)}$

$P(E) = \frac{5}{25}= \frac{1}{5}$

Let 'E⁻ be the event of the child play does not play the piano

$P(E^{-}) = 1- P(E)$

$P(E^{-}) = 1- \frac{1}{5} =\frac{4}{5}$

Conclusion:-

probability that the child DOES NOT play the piano

$P(E^{-}) =\frac{4}{5}$

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