A sports store sells a total of 70 soccer balls in one month and collects a total of $2,400. Write

Mathematics

1 answer:

bezimeni [28]3 years ago

7 0

I believe around thirty five

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How do i graph x+4y=8

Andrew [12]

Answer:

x = 8 y = 2

(8,2)

Step-by-step explanation:

You have to find the value of both x and y

x + 4y = 8

to find x you have to cancel out y so,

x + 4(0) = 8

x = 8

to find y you have to cancel out x

0 + 4y = 8

4y = 8

divide both sides by 4

y = 2

Hope this Helps!!!

6 0

3 years ago

Can someone please help me with this one

nataly862011 [7]

Hey sorry I need points

3 0

3 years ago

Read 2 more answers

How to find the mean of a probability distribution?

e-lub [12.9K]

That depends. If you have a finite data set, you would add up all the points you have and divide by the total count.

Or, if you are working with pure distributions, the mean is the same as the expected value of the corresponding random variable.

Suppose you have a discrete random variable $X$ with a given probability mass function $f_X(x)$ , then the mean is given by

$\mathbb E(X)=\displaystyle\sum_xxf_X(x)$

which would mean you take all the possible probability for the event that $X=x$ , multiply each by that $x$ , and add them together.

If the distribution is continuous, say a random variable $Y$ that has probability distribution function $f_Y(y)$ over some support $S$ , then the mean is

$\mathbb E(Y)=\displaystyle\int_Syf_Y(y)\,\mathrm dy$