Pls help me ill give brainliest.
Pls do all three

What expression is equivalent to 1/2(2+3x-6)

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.