Help down below please

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)

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74