Select Best Option
1. Determine the center and radius of the circle, x² + y2 = 49
A) (0,0): 49
B) (0,7): 49
C) (7,0): 7
D) (0,0); 7

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

the first option i believe

step-by-step explanation:

really your just stupid if you don't know this

step-by-step explanation: