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3 years ago

Estimating quotient for greater dividend

Mathematics

1 answer:

Karo-lina-s [1.5K]3 years ago

7 0

Yup it has to be a greater divedend if not answer would be completly wrong

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Determine the equation of the line perpendicular to y = 1 - 1/4x and passing through the point (-3,5)

Verdich [7]

Answer:

y = 4x + 17

Step-by-step explanation:

y = 1 - 1/4x = - 1/4 x + 1 .... slope -1/4

perpendicular line slope = - (1 / (-1/4) = 4

pass (-3,5): (y-5) / (x - -3) = 4

y-5 = 4x + 12

y = 4x + 17

4 0

3 years ago

Use the confidence level and sample data to find a confidence interval for estimating the population mu. Round your answer to th

Schach [20]

Answer: $(587.67,596.33)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\ \pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample mean : $\overline{x}= 592$ hours

Standard deviation $\sigma= 25$ hours

Sample size : n=90, which is a large sample(n<30), so we use z-test.

Significance level: $1-0.90=0.1$

Critical value : $z_{\alpha/2}=t_{22,0.025}=1.645$

Then , the confidence interval for population mean will be :-

$592\ \pm\ (1.645)\dfrac{25}{\sqrt{90}}\\\\\approx592\pm4.33\\\\=(592-4.33,592+4.33)\\\\=(587.67,596.33)$

Hence, the 90% confidence interval for the mean life $\mu$ of all light bulbs of this type. is $(587.67,596.33)$

3 0

4 years ago

25a-3b+7a+25b-18a-16b+20b

GrogVix [38]

The answer to ur question is 19a+b

8 0

3 years ago

1 1/3 x 3/5 and simplify

ser-zykov [4K]

Answer:

4/5

Step-by-step explanation:

1 1/3 = 4/3

4/3 x 3/5

times the denominator and numerator = 12/15

divide by HCF which is 3

4/5

8 0

3 years ago

Which percent change represents a percent increase

OLEGan [10]

Answer:

Step-by-step explanation:

7 0

3 years ago