Apoll of 2,014 randomly selected adults showed that 93% of them own cell phones. the technology display below results from a test of the claim that 91%of adults own cell phones. use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts test of p=0.91 vs pnot =0.91 sample xn sample p 95% ciz-value p-value118812 , 0140.933962 (0.919708, 0.948217) 3.760.000

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

true

step-by-step explanation:

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