Acompany charges $6 to make a pattern for an order of t-shirts and $11 for each t-shirt it produces form the pattern. the expression $11n+$6 represents the cost of n t-shirts with the same pattern. find the total cost for 5 t-shirts with the same pattern.

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

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.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?