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4 years ago

Find the solution of "X" Please: 3(−3−3x)+4=−5

Mathematics

2 answers:

Kaylis [27]4 years ago

6 0

Answer:

x=0

Step-by-step explanation:

3(-3-3x)+4=-5

-9-9x+4=-5

-5-9x=-5

-9x=0

x=0

Lesechka [4]4 years ago

4 0

Answer:

infinite

Step-by-step explanation:

1. -9-9x+4=-5

2. x=0/-9

3. x = infinite

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Suppose that an internal report submitted to the managers at a bank in Boston showed that with 95 percent confidence, the propor

Dmitry [639]

Answer:

The sample size used to compute the 95% confidence interval is 1066.

Step-by-step explanation:

The (1 - α)% confidence interval for population proportion is:

$CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

The 95% confidence interval for proportion of the bank's customers who also have accounts at one or more other banks is (0.45, 0.51).

To compute the sample size used we first need to compute the sample proportion value.

The value of sample proportion is:

$\hat p=\frac{Upper\ limit+Lower\ limit}{2}=\frac{0.45+0.51}{2}=0.48$

Now compute the value of margin of error as follows:

$MOE=\frac{Upper\ limit-Lower\ limit}{2}=\frac{0.51-0.45}{2}=0.03$

The critical value of z for 95% confidence level is:

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

Compute the value of sample size as follows:

$MOE=z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\0.03=1.96\times \sqrt{\frac{0.48(1-0.48)}{n}}\\(\frac{0.03}{1.96})^{2}=\frac{0.48(1-0.48)}{n}\\n=1065.404\\n\approx1066$

Thus, the sample size used to compute the 95% confidence interval is 1066.

4 0

3 years ago

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system, and orders an ins

AVprozaik [17]

Answer: 17.89

Step-by-step explanation:

In binomial distribution, the standard deviation is given by :-

$\sigma=\sqrt{np(1-p)}$

As per given , we have

The number of vouchers in the sample with errors is denoted by x.

p= 0.20 , n = 2000

Then , $\sigma=\sqrt{2000\times(0.2)(1-0.2)}$

$\sigma=\sqrt{320}=17.88854382\approx17.89$

Hence, the standard deviation of x is 17.89.

6 0

3 years ago

11) A map of North Carolina is scaled so that 3 inches represents 93 miles. How far apart are Raleigh

aliina [53]

Answer:

Step-by-step explanation:

please help

8 0

2 years ago

Helpppp me i dont understand this and i need the answer fast <3

NikAS [45]

Answer:

it would be -4.5

Step-by-step explanation:

cause thats the middle

5 0

3 years ago

Select all complex numbers 5-√9/4 1+√-3 4-3√-16 2-√12➗5 3+2√-9➗7 9√-7/5

harina [27]

Answer:

5-√9/4 4-3√-16 3+2√-9➗7

Step-by-step explanation:

5 0

3 years ago