Line slope of 2/3 and y intercept of -3

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

98 point question what is the record for most points in one

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?