I also need help on this question. Please help me. (x+15) + (x+5) + (x+15) + (x+5)

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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