3 years ago

How do you find variance

Mathematics

1 answer:

Pepsi [2]3 years ago

4 0

And if you need an example this is the website I went to: http://www.mathsisfun.com/data/standard-deviation.html

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The number of calculators and backpacks that were turned into the school lost and found have been recorded for 10 days in the sc

34kurt

You need to show the scatter plot

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2 years ago

Tickets to a concert cost $2 for children, $3 for teenagers and $5 for adults. When 570 people attended the concert, the total t

-Dominant- [34]

Let

x--------> the number of children

y------> the number of teenagers

z------> the number of adults

we know that

$2x+3y+5z=1,950$ ------> equation A

$x+y+z=570$ -----> equation B

$y=\frac{3}{4}x$

$x=\frac{4}{3}y$ -------> equation C

Substitute equation C in equation A and equation B

$2[\frac{4}{3}y]+3y+5z=1,950$

$\frac{17}{3}y+5z=1,950$ --------> equation D

$[\frac{4}{3}y]+y+z=570$

$\frac{7}{3}y+z=570$ --------> equation E

Multiply equation E by $-5$

$-\frac{35}{3}y-5z=-2,850$ --------> equation F

Adds equation D and equation F

$\frac{17}{3}y+5z=1,950\\\\-\frac{35}{3}y-5z=-2,850\\\\---------\\\\-\frac{18}{3}y=-900\\\\y=3*900/18\\\\y=150\ teenagers$

therefore

<u>the answer is the option</u>

$150\ teenagers$

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2 years ago

Read 2 more answers

The graph of y=3x+2x-2^2 is shown. A) what are the coordinates

lukranit [14]

Answer:

(

)

Explanation:

Two lines are parallel if they share the same slope.

Any line parallel to

will have the slope 10.

Now, we have:

−

We try to find

(

)

(

−

)

Step-by-step explanation:

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2 years ago

What percent of 630 is 270

Tatiana [17]

I don't Clearly understand your question but I think it is 0.428571

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Matthew and Ava have some money in the ratio 5:2. If Matthew gives $78 to Ava they will have the same amount of money. How much

MaRussiya [10]

Answer:

is d

Step-by-step explanation:

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3 years ago