First you need to find the r, if C=2pieR, than 2.4=2pieR now you divide 2.4 by 2 so you got 1.2=pieR now you divide 1.2 by pie and obtained aproximately 0.38 miles, that is your R, now you do pie multiply by 0.38 exposant 2 and there you go, your answer is aproximately 0.45 miles2 :)
Combine like terms. So that means combine the X's and combine the regular numbers.
- add 2x to 8x
- combine +15 -5
- then add 11 to that
- once you're done, find X by dividing 10x by whatever you have after the = sign
2=8x-2/9
add 2/9 to both sides
2 and 2/9=8x
2=18/9
2 and 2/9=18/9+2/9=20/9
20/9=8x
multiply both sides by 9
20=72x
divide boht isdes by 72
20/72=x=5/18
I'm assuming all of (x^2+9) is in the denominator. If that assumption is correct, then,
One possible answer is ![f(x) = \frac{4}{x}, \ \ g(x) = x^2+9](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%5Cfrac%7B4%7D%7Bx%7D%2C%20%20%5C%20%5C%20g%28x%29%20%3D%20x%5E2%2B9)
Another possible answer is ![f(x) = \frac{4}{x+9}, \ \ g(x) = x^2](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%5Cfrac%7B4%7D%7Bx%2B9%7D%2C%20%5C%20%5C%20g%28x%29%20%3D%20x%5E2)
There are many ways to do this. The idea is that when we have f( g(x) ), we basically replace every x in f(x) with g(x)
So in the first example above, we would have
![f(x) = \frac{4}{x}\\\\f( g(x) ) = \frac{4}{g(x)}\\\\f( g(x) ) = \frac{4}{x^2+9}](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%5Cfrac%7B4%7D%7Bx%7D%5C%5C%5C%5Cf%28%20g%28x%29%20%29%20%3D%20%5Cfrac%7B4%7D%7Bg%28x%29%7D%5C%5C%5C%5Cf%28%20g%28x%29%20%29%20%3D%20%5Cfrac%7B4%7D%7Bx%5E2%2B9%7D)
In that third step, g(x) was replaced with x^2+9 since g(x) = x^2+9.
Similar steps will happen with the second example as well (when g(x) = x^2)