Answer:
33
Step-by-step explanation:
Add 165 and 80 to get 245. 80 times 3 = 240.
So 80 is around 1/3 of 240. In other words it is around 33%
Rachel would take 30 minutes to run in 4miles
220 (divide sign) 5 = 44ml (change it to liters) 0.044 (move the decimal from 44.0 their by two spots so it would be 0.044)
48 sq. Units
If I’m wrong I’m truly sorry
The three points A,B,C are all points on this circle.
Each point is then equal distance from the center, that distance being the radius of the circle.
Using the distance formula, we can find the center of the circle (x,y):
![d^2 = (x-x_0)^2 + (y-y_0)^2](https://tex.z-dn.net/?f=d%5E2%20%3D%20%28x-x_0%29%5E2%20%2B%20%28y-y_0%29%5E2)
Plugging in points A and B into distance formula, then setting them equal to each other gives:
![(x-2)^2+(y-6)^2 = (x-2)^2 + y^2](https://tex.z-dn.net/?f=%28x-2%29%5E2%2B%28y-6%29%5E2%20%3D%20%28x-2%29%5E2%20%2B%20y%5E2)
Right away we can cancel out the x terms leaving:
![(y-6)^2 = y^2](https://tex.z-dn.net/?f=%28y-6%29%5E2%20%3D%20y%5E2)
Expand Left side and Solve for y:
![y^2 -12y +36 = y^2](https://tex.z-dn.net/?f=y%5E2%20-12y%20%2B36%20%3D%20y%5E2)
![y = 3](https://tex.z-dn.net/?f=y%20%3D%203)
Plug in points B and C as before:
![(x-2)^2 + y^2 = (x-10)^2 + y^2](https://tex.z-dn.net/?f=%28x-2%29%5E2%20%2B%20y%5E2%20%3D%20%28x-10%29%5E2%20%2B%20y%5E2)
Here we can cancel the y-terms.
Expand and solve for x:
![x^2 -4x+4 = x^2 -20x+100](https://tex.z-dn.net/?f=x%5E2%20-4x%2B4%20%3D%20x%5E2%20-20x%2B100)
![16x = 96](https://tex.z-dn.net/?f=16x%20%3D%2096)
![x = 6](https://tex.z-dn.net/?f=x%20%3D%206)
Therefore the center of the circle is the point (6,3)