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MrRissso [65]
3 years ago
10

Subtact: (3x + 4) - (x + 2)​

Mathematics
2 answers:
stiv31 [10]3 years ago
8 0
Ok this is the answer to this question 2(x+1)
netineya [11]3 years ago
8 0
2(x + 1) is the answer. next time use photomath
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To estimate a population mean, the sample size needed to provide a margin of error of 3 or less with a 95% confidence when the p
Over [174]

Answer:

The minimum sample needed to provide a margin of error of 3 or less is 52.

Step-by-step explanation:

The confidence interval for population mean (<em>μ</em>) is:

\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

The margin of error is:

MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

<u>Given:</u>

MOE = 3

<em>σ </em>= 11

The critical value for 95% confidence interval is: z_{\alpha /2}=1.96

**Use the <em>z</em>-table for critical values.

Compute the sample size (<em>n</em>) as follows:

MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=1.96\times \frac{11}{\sqrt{n}}\\n=(\frac{1.96\times11}{3} )^{2}\\=51.65\\\approx52

Thus, the minimum sample needed to provide a margin of error of 3 or less is 52.

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2 years ago
the yeastie boys new album bread and the bank goes on sale next week they autographed 85% of 2000 copies before they were packag
kupik [55]
0.85 x 2000 = 1700 copies
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2 years ago
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Audrey is buying a nee car for $32,998. She plans to make a down payment of $4,200. If she's to make a monthly payments of $525
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Answer:

  x = 64 m

Step-by-step explanation:

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Step-by-step explanation:

Because if 42 equals 7 times r you just have to divide 42 by 7.

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