What is the equation of a circle with center (2, −8) and radius 9?
A) (x + 2)2 + (y − 8)2 = 9
B) (x − 2)2 + (y + 8)2 = 9
C) (x + 2)2 + (y − 8)2 = 81
D) (x − 2)2 + (y + 8)2 = 81

D) (x − 2)^2 + (y + 8)^2 = 81

Step-by-step explanation:

The equation of a circle can be given by

(x-h)^2 + (y-k)^2 = r^2

where (h,k) is the center and r is the radius

We know the center is (2,-8) and the radius is 9

(x-2)^2 + (y--8)^2 = 9^2

(x-2)^2 + (y+8)^2 = 9^2

(x-2)^2 + (y+8)^2 = 81

Equation is  (x - 2)² + (y + 8)² = 81

Step-by-step explanation:

Equation is (x - 2)² + (y - -8)² = 9²

⇒ (x - 2)² + (y + 8)² = 81

tickets for the harlem globetrotters

show at michigan state university in

2010 cost $16, $23, or, for vip seats, $40.

total revenue = 16x + 23y + 40z

if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, sales of all three kinds of tickets would

total $46,575.

16x + 23y + 40z = 46575, how many of each kind of ticket would

have been sold?

solve for x, y and z

x − 9z = 0

x − y − z = 55

16x + 23y + 40z = 46575

x = 1170

y = 985

z = 130

welcome!

i think it is c, not positive though

step-by-step explanation: