Which is equivalent to 3 square root 81/4

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

If g(x) = x+1/ x-2 and h (x) =4 - x , what is the value of ( g*h) (-3)?

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?