The sum of 1 and a number divided by 7 is 66

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.

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]