Combine like terms. what is a simpler form of the expression?

-3(-4y + 3) + 7y

a.
19y - 9

b.
10y

c.
-19y + 3

d.
-19y - 9

Twenty points. 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

Acomposition of transformations maps δxyz to δx"y"z". the first transformation for this composition is , and the second transformation is a 90° rotation about point x'.

Having a hard time understanding this question (see attachment).