That looks like negative 17
Answer:
(x + 4)^2 + (y - 8)^2 = 81
or
(x + 4)^2 + (y - 8)^2 = 9^2 depending on how your teacher wants it written.
Step-by-step explanation:
The standard form for a circle is
(x + h)^2 + (y + k)^2 = r^2
r is the radius.
You are given the diameter
r = d/2
r = 18/2
r = 9
So you already have the right hand side of the equation
(x + h)^2 + (y + k)^2 = 9*2
(x + h)^2 + (y + k)^2 = 81
You basically have h and k as well. They come from the center point.
h = 4
k = - 8
So the equation of the circle (and the answer) is
(x + 4)^2 + (y - 8)^2 = 81
One question remains. Why do the x and y values change signs? If you know what the distance formula is, then what you are finding is the distance r of all points on the circle from the center of the circle.
It is the distance formula that is actually the formula for the circle.
-4x-10-3=-3x+3
-4x+3x = 10+3+3
-1x = 16
x = -16
Answer:
Maybe
Step-by-step explanation:
If its in degrees then for sure.
But if its labeled those values then I'm not 100% sure.
Answer:
C.
Step-by-step explanation:
Easiest and quickest way to do this is to plug it into your calc. Using the Binomial Theorem would be a time killer for this question, especially when it's an evaluation question.