Can someone help me, please and thank you? I'll give BRAINLEST to the person who gets it right!!!

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)

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?