Answer:
<h2>a) (5, 11)</h2><h2>b) r = 9</h2><h2>c) (-4, 11)</h2>
Step-by-step explanation:
The equation of a circle in standard form:
![(x-h)^2+(y-k)^2=r^2](https://tex.z-dn.net/?f=%28x-h%29%5E2%2B%28y-k%29%5E2%3Dr%5E2)
(h, k) - center
r - radius
We have the equation:
![(x-5)^2+(y-11)^2=81](https://tex.z-dn.net/?f=%28x-5%29%5E2%2B%28y-11%29%5E2%3D81)
Therefore
a) h = 5, k = 11 → the center (5, 11)
b) r² = 81 → r = √81 = 9 - radius
c) We choose any value of x, but one which h - r ≤ x ≤ h + r
5 - 9 = -4
5 + 9 = 14
-4 ≤ x ≤ 14
Let x = -4. Put to the equation and solve for y:
![(-4-5)^2+(y-11)^2=81](https://tex.z-dn.net/?f=%28-4-5%29%5E2%2B%28y-11%29%5E2%3D81)
![(-9)^2+(y-11)^2=81](https://tex.z-dn.net/?f=%28-9%29%5E2%2B%28y-11%29%5E2%3D81)
<em>subtract 81 from both sides</em>
<em>add 11 to both sides</em>
![y=11](https://tex.z-dn.net/?f=y%3D11)
(-4, 11)
Answer:
I think its at 8%
Step-by-step explanation:
Answer:
800m
Step-by-step explanation:
First you multiply 20 by 60 to determine the amount of seconds in 20 minutes, which is 1200. then you divide 1200 by 1.5 to get the distance, which is 800m
Say you are adding in the ones place and it's more than 1 number you have to take the first number and put it in the hundreds. For example, 6+6=12 so you put the one in the hundreds place