3 years ago

Twice a number increased my 3 times the number

Mathematics

1 answer:

Alexxandr [17]2 years ago

3 0

The answer is 2n+3n.

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Steve has overdrawn his checking account by 27$. His bank account charged him 15$ for an overdraft fee. Then he quickly deposite

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112. Subtract the fee and add the deposit

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3 years ago

Jane travels 7/8 distance to school by car, and walks the rest of the way. If she walks about 440 yd, what is the distance in mi

Vikentia [17]

ANSWER: 3,520 yards = 2 miles.

440 yds is 1/8. Multiply 440 by 8 to get the full distance. Hope this helps! :)

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3 years ago

A sample was taken of the salaries of four employees from a large company. the following are their salaries, in thousands of dol

Free_Kalibri [48]

For given sample of salaries of four employees, the variance of their salaries is: 26 thousands of dollars

The formula for the variance is,

$S^2=\frac{\sum (x_i - \bar{x})^2}{n-1}$

where,

$S^2$ = sample variance

$x_i$ = the value of the one observation

$\bar{x}$ = the mean value of all observations

n = the number of observations

For given question,

n = 4

First we find the mean of their salaries.

(33 + 31 + 24 + 36 ) / 4 = 31

So, $\bar{x}=31$

Using the formula for variance ,

$S^2=\frac{(33-31)^2}{4-1}+\frac{(31-31)^2}{4-1}+\frac{(24-31)^2}{4-1}+\frac{(36-31)^2}{4-1}\\\\ S^2=\frac{4}{3} + \frac{0}{3} + \frac{49}{3} + \frac{25}{3} \\\\S^2= \frac{4+49+25}{3}\\\\S^2=\frac{78}{3} \\\\S^2=26$

Therefore, for given sample of salaries of four employees, the variance of their salaries is: 26 thousands of dollars

Learn more about the variance here:

brainly.com/question/13673183

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7 0

2 years ago

8) A pyramid has a rectangluar base with length 12 km and width of 5 km. If the volume is 200

SashulF [63]

Hi there!

$\large\boxed{h = 10km}$

We know that the equation for the volume of a pyramid is:

V = 1/3(bh)

We know that:

V = 200 km³

b = 12 × 5 = 60 km²

We can plug these into the equation:

200 = 1/3(60)(h)

Simplify:

200 = 20h

Divide both sides by 20:

200/20 = 20h/20

h = 10 km

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2 years ago

The circumference of a circle can be found using the<br> formula C = 2 nr.

victus00 [196]

Radius = circumference/2(3.14)
OPTION 3

5 0

2 years ago

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