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3 years ago

What is 8 1/3 - 2 2/3 =?

Mathematics

1 answer:

Rom4ik [11]3 years ago

5 0

Answer:

17/3

Step-by-step explanation:

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Convert 20 miles to km

djverab [1.8K]

Answer:

32.1869

Step-by-step explanation:

multiply 20 by 1.609

multiplying miles by 1.609 will give you the answer

8 0

4 years ago

Read 2 more answers

Biologists studying horseshoe crabs want to estimate the percent of crabs in a certain area that are longer than 35 centimeters.

mina [271]

Answer:

A.one sample z-confidence interval for the population proportion

Step-by-step explanation:

-A confidence interval is a range of values in which the true population mean is believed to lie.

-Given just one sample, the one sample z-confidence interval for the population proportion is appropriate and is defined as:

$CI=\dot p\pmz_{\alpha/2}\sqrt{\frac{\dot p(1-\dot p)}{n}$

3 0

3 years ago

An agency is studying the income of store managers in the retail industry. A random sample of 25 managers reveals a sample mean

aalyn [17]

Answer:

The Confidence Interval = ($44,745.55 , $46,094.45)

Step-by-step explanation:

The formula for Confidence Interval =

Confidence Interval = Mean ± z × Standard deviation/√n

Where n = number of samples = 25 managers

Standard deviation = $2,050

Mean = $45,420

z = z score of the given confidence interval

= z score of 90% confidence interval

= 1.645

Confidence Interval = $45,420 ± 1.645 × $2,050/√25

= $45,420 ± 1.645 × $2,050/5

= $45,420 ± 674.45

Confidence Interval =

$45,420 - 674.45 = $44,745.55

$45,420 + 674.45 = $46,094.45

Therefore, the Confidence Interval = ($44,745.55 , $46,094.45)

3 0

3 years ago

-8w-7+2w=23 what does that equal

olya-2409 [2.1K]

W=-5 because you distribute at the beginning with the 2 variables and you solve that's equation and you will end up with 6w divided by 30 and that's will give u W=-5

7 0

4 years ago

Will Give Brainlyest!

Advocard [28]

Answer:

c. Change the length of side CB to 8 feet

Step-by-step explanation:

If the figures are similar, the ratios should be the same

Take the side of the larger triangle over the same side of the smaller

PR PQ RQ

----------- = --------------------= ----------------

AC AB CB

7.5 5 10

----------- = --------------------= ----------------

6 4 9

7.5 /6 = 1.25

5/4 = 1.25

10/9 =1.1111(repeating)

The bases are not in the right ratio. RQ over CB = 1.25. Since RQ = 10 and the ratio is 1.25, we can solve for CB

10/CB = 1.25

Multiply by CB on each side

10 = 1.25CB

Divide by 1.25 on each side

10/1.25 = CB

8 =CB

6 0

4 years ago