Andrew spent 1/1/6 hours studying for his science exam he spent another one and 1/2 hours studying for his history exam how many total hours did andrew spend studying for his exams draw fraction circles to solve

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)