Answer:
$78
Step-by-step explanation:
$65 x 1.20 = $78
or
$65 x 0.20 = $13
$65 + $13 = $78
It would be 345 + x = 987 and to solve it you would use the equation 987 - 345 = x
The standard form form for a circle is
![(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)
, where h and k are the center's coordinates respectively, and r is the radius. The first circle has a center at the origin, so the center's coordinates are (0, 0). Counting from the center straight across or up or down to a point on the circle tells us that the radius is 5. Our equation then is
![(x-0)^2+(y-0)^2=5^2](https://tex.z-dn.net/?f=%28x-0%29%5E2%2B%28y-0%29%5E2%3D5%5E2)
, or simplifying,
![x^{2} +y^2=25](https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20%2By%5E2%3D25)
. The second circle has a center of (5, 4). The radius is 3. So the equation for that circle is
![(x-5)^2+(y-4)^2=9](https://tex.z-dn.net/?f=%28x-5%29%5E2%2B%28y-4%29%5E2%3D9)
. The last circle has a center of (4, 3) and a radius of 5. The equation for that circle is
![(x-4)^2+(y-3)^2=25](https://tex.z-dn.net/?f=%28x-4%29%5E2%2B%28y-3%29%5E2%3D25)
. And there you go!
4(5) - 2/-2(-3) + 1
20 - 2/6 + 1
18/7
2 4/7
Letter b
Well u have 4 so u multiply 8 by 8
8 x 8 =64/8
64/8= 8
then we need to divide by 2
64/2 = 32
32/8 = 4 4+4=8