What is 3log(2)3-log(2)(x+4) written as a single logarithm

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)

If the value of cos330°is√3/2 then find cos 165°.

How many verticies does a triangular prims have