F=9g+2h work out the value of f when g=-6 and h=7

Does the point (1, sqrt 7) lie on circle shown.

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)