What is the area of the given circle in terms of pi?
a.16.2pi m^2
b.10.89pi m^2
c.21.78pi m^2
d.43.56pi m^2
i keep doing 6.6/ 1/2=3.3 then i do area=3.14*3.3*3.3=34. i'm so confused? what am i not doing right?

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.