Acompany manager wants to estimate the average length of phone calls in a call center for a tech support company. in a sample of 2500 calls, the mean duration is 163 seconds and the population standard deviation is 114 seconds. describe the distribution of this sample involving the sampling distribution of sampling means.

all but the second one

step-by-step explanation:

cuz that one goes over 180

mark brainliest

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

answer: idk

step-by-step explanation: