2 years ago

Stupid edgenuity can anyone help

Mathematics

2 answers:

olganol [36]2 years ago

7 0

A is positive because they both are negative it cancels out to be positive

leva [86]2 years ago

6 0

Answer:

the first one :)

Step-by-step explanation

If the number of negatives is an even number it would make it positive and if it is an odd number it would make it negative.

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Please help me, what is the answer?

frutty [35]

Yes, pentagon prism

8 0

2 years ago

Based on these results, express the probability that the next customer will pay with something other than a credit card as a fra

Marina CMI [18]

Answer: 99/130

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8 0

2 years ago

A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35

Maslowich

Answer:

1,539

Step-by-step explanation:

Using Simple Random Sampling in an infinite population (this is such a large population that we do not know the exact number) we have that the sample size should be the nearest integer to

$\large \frac{Z^2pq}{e^2}$

where

Z= the z-score corresponding to the confidence level, in this case 90%, so Z=1.645 (this means that the area under the Normal N(0,1) between [-1.645,1.645] is 90%=0.9)

p= the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year= 35% = 0.35

q = 1-p = 0.65

e = the error proportion = 2% = 0.02

Making the calculations

$\large \frac{Z^2pq}{e^2}=\frac{(1.645)^2*0.35*0.65}{(0.02)^2}=1,539.09$