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jek_recluse [69]
3 years ago
7

Alex and Leonardo purchase to matinee movie tickets mantiee ticket cost $6.50 and drinks cost $5.50 and a bag of popcorn cost $6

.00 Define each variable and write an algebraic expression to describe how much they spend based on the number of drinks and bags of popcorn Day by identify the parts of the expression by underlining the coefficients circling the Constants, and drawing a box around the variables
Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
6 0
Cost= (5.50d+6.00p) +6.50

Coefficients: 5.50 and 6.00
Constant: 6.50
Variables: d and p
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Read 2 more answers
The standard deviation of a sample taken from population A is 17.6 for a sample of 25.
lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation \sigma_A is

\sigma_A = 17.6

The sample size n_A is:

n_A = 25.

For the sample of population B, the standard deviation \sigma_B is

\sigma_B = 21.2

The sample size n_B is:

n_B = 30.

Then the standard deviation for the difference of means has the following form:

\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}

Finally

\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23

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