What is 5√28 + √63 in simplest radical form

Which shows the pre image of triangle xyz

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.

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?