For a list of data, you would:

1) Find the average (mean) of all the data numbers. (Add all of the numbers, then divide by how many numbers there are in the list).

2) Take each number in the original data list and subtract that average number from each data number. Then, square the result. You should now have a new list of numbers.

3) Find the average of all the numbers in this new list.

4) Take the square root of that average, which is the standard deviation for that data.

Anytime!                  

Thanks NinjaDevo!

The average of 6 numbers is 6. This means that all 6 numbers have to add up to 36.

It doesn't matter what the numbers are, but in order to average out to 6, the sum of all the numbers divided by 6 has to equal 6.

The only thing that gives 6 when divided by 6 is 36.

Now, 3 is subtracted from 4 numbers, for a total of 12.

(36-12)/6 tells us our new average

24/6

4 is the new average.

(4x - 1) + (2x + 2) = 1

This is the same thing as:

(4x) - (1) + (2x) + (2) = 1

Now we combine like terms (combine the 4x and 2x together. Combine the -1 and +2 together)

(6x) + (1) = 1

So the answer would be: "The equation can become 6x + 1 = 1 by combining like terms."

Wow! Nice explanation anonymous!

I gave you a "thumbs up" on your answer.

You should make an account and join the community. That way your points will add up for you on your account. :)

Your question is a bit unclear.

Are you wondering, "What operation do I use to find the cost per gallon?"

If this is what you mean, you want to use division.

13.60 ÷ 15 = ?            ---The total cost divided by the number of gallons gives you the cost per gallon

$${\frac{{\mathtt{13.6}}}{{\mathtt{15}}}} = {\frac{{\mathtt{68}}}{{\mathtt{75}}}} = {\mathtt{0.906\: \!666\: \!666\: \!666\: \!666\: \!7}}$$

or rounded to the nearesnt cent, $0.91 per gallon.

That's some pretty cheap gas! I'd fill up your tank at that gas station. :)

To type in absolute values on the websites, you just type in the prefix "abs" then put what you want absoluted in parentheses.

x=1

So the answer is x=1

(1.0321)to the 4th power is right below. 1.1347158263887681 is the answer.

You have to pay attention, never fool around, and study really hard to get good grades, and then if you keep doing that, the tests will be easier!

Hey zegroes, you there?

What?it just stands for mass times the speed of light(C)squared the E Stands for energy.Its just a formula theres no answer because its already solved

number 38 PLEASE!

i would advice to study hard , practise regularly and never get nervous while giving the test which can make you forget many things!

and remember the more u practise maths the better u'll get in it!

First, think about what the word "percent" means. "Per-" means "out of" and "-cent" means 100 (think "centennial"--100 years, etc.). Therefore, "percent" means "out of 100." I'll rephrase the question for you: 600 out of 82500 is equal to what number out of 100? 

We start by setting up a proportion. We put a variable, x, in for our unknown. In this case, we don't know what number out of 100--the percent. Our proportion looks like this:

$${\frac{{\mathtt{600}}}{{\mathtt{82\,500}}}} = {\frac{{\mathtt{x}}}{{\mathtt{100}}}}$$

Now, all we have to do is solve for x! We cross-multiply the fraction together (we can only do this for proportions-- two fractions separated by an equals sign), and we get:

600*100 = 82500x .

600*100=60000, so we can simplify the above to:

60000=82500x  .

Finally, we divide both sides by 82500, and since 60000/82500=600/825=120/165=24/33=8/11 ,

$${\mathtt{x}} = {\frac{{\mathtt{8}}}{{\mathtt{11}}}}$$ % of 82500. If you need a decimal, and not a fraction, use long divison to get that 8/11 ≈ 0.727.

600 is 8/11 % or 0.727% of 82500.

Can you please do #40, Melody?

If we know the degree measure, we can use the following "formula"....

[degree measure / 360]   x   [2*pi*r] = s      (where s = arc length)

If you have taken Trig, you might be familiar with "radian" measure ("rads")

The "formula" for this is

s = rΘ     (where Θ is in "rads")

thanks

(320lbs/2000lbs) x $240  = $38.40

Your Welcome NinjaDevo!Thats what im trying hard to do with you all , amaze in this week becoz i not gonna get a chance in the next so why not do it all in this one only!

Though im happy you liked my post!

Thanks again rosala. You never fail to amaze!

Those  "Astonishing Views Of The World" really are astonishing!

Hey Meoldy!

Not sure if you read my entire post...but are you doing these the same way that CPhill was? I totally appreciate his work, and he always gets answers right...but for some reason these square roots radicals have been wrong. im not sure about your answers...i will know in an hour