Answer:
x=7
hope this helps :) plz brainliest if helps
Step-by-step explanation:
Answer:
The diameter of the circle is 40 units
Step-by-step explanation:
![x^2+y^2+6x-4y=387](https://tex.z-dn.net/?f=x%5E2%2By%5E2%2B6x-4y%3D387)
![x^2+6x+y^2-4y=387](https://tex.z-dn.net/?f=x%5E2%2B6x%2By%5E2-4y%3D387)
![(x^2+6x+9)+(y^2-4y+4)=387+9+4](https://tex.z-dn.net/?f=%28x%5E2%2B6x%2B9%29%2B%28y%5E2-4y%2B4%29%3D387%2B9%2B4)
![(x+3)^2+(y-2)^2=400](https://tex.z-dn.net/?f=%28x%2B3%29%5E2%2B%28y-2%29%5E2%3D400)
![r^2=400](https://tex.z-dn.net/?f=r%5E2%3D400)
![r=20](https://tex.z-dn.net/?f=r%3D20)
![d=2r=2(20)=40](https://tex.z-dn.net/?f=d%3D2r%3D2%2820%29%3D40)
So firstly, you're gonna replace the T variable with 2.2, which is the time given to us. And so the equation is gonna look like this:
![2.2=2*3.14* \sqrt{ \frac{L}{32} }](https://tex.z-dn.net/?f=2.2%3D2%2A3.14%2A%20%5Csqrt%7B%20%5Cfrac%7BL%7D%7B32%7D%20%7D%20)
and we will be solving for L.
The next thing you wanna do multiply 2 and 3.14 together, so your equation should look like this:
![2.2=6.28* \sqrt{ \frac{L}{32} }](https://tex.z-dn.net/?f=2.2%3D6.28%2A%20%5Csqrt%7B%20%5Cfrac%7BL%7D%7B32%7D%20%7D%20)
After that, you're gonna want to square all the terms in this equation (2.2, 6.28, and
![\sqrt{ \frac{L}{32} }](https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%5Cfrac%7BL%7D%7B32%7D%20%7D%20)
) to remove the square root. Your equation will look like this
![4.84=39.4384* \frac{L}{32}](https://tex.z-dn.net/?f=4.84%3D39.4384%2A%20%5Cfrac%7BL%7D%7B32%7D%20)
Next up is you're gonna multiply 32, the reciprocal of 1/32, on each side so that the equation looks like this
![154.88=39.4384*L](https://tex.z-dn.net/?f=154.88%3D39.4384%2AL)
After, you're gonna divide 39.4384 on each side, and your equation should end up at
![3.927=L](https://tex.z-dn.net/?f=3.927%3DL)
. And assuming from your options, they are gonna want you to round to the nearest whole number, so the best option is 4 feet.
Answer:
lo siento im no es bueno con español, pero creo que es cuatrocientos cuarenta
Step-by-step explanation: