The standard equation of the circle is:
(x-h)^2+(y-k)^2=r^2 where (h,k) it the center of the circle and r is the radius...
so
30.
(x-2)^2+(y-7)^2=16
31.
We need to find the radius...(I'll just use the Pythagorean Theorem)
r^2=6^2+8^2
r^2=36+64
r^2=100 (so the radius is 10) and its center is (-6,-8) so
(x+6)^2+(y+8)^2=100
For this case we have the following function:

We look for the points of intersection with the x axis, doing y = 0

We look for the points of intersection with the y axis, doing x = 0

We can also observe that the slope is -1.

Answer:
See attached image
Answer:
x = - 15
Step-by-step explanation:
+
= -
( multiply through by 9 to clear the fractions )
x + 3 = - 12 ( subtract 3 from both sides )
x = - 15
Answer:
3/20
Step-by-step explanation:
0.15 = 15*100/1*100
= 15/100
= 3/20