Can you explain a little more what this means​

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

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be