In melanie's styling salon, the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes. the slowest quartile of customers will require longer than how many minutes for a simple haircut?

(a) 3(n+1)/4 minutes
(b) 26 minutes
(c) 25.7 minutes
(d) 27.7 minutes

(D) 27.7 minutes

Step-by-step explanation:

The slowest quartile starts at the 75th percentile:

The z-score for the 75th percentile is approximately 0.675. Z-score is given by:

Where 'μ' is the population mean and 'σ' is the standard deviation

At the 75th percentile, the time for a haircut is:

Therefore, the slowest quartile will require at least 27.7 minutes for a haircut.

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.