85% of all cars sold in chicago are some color other than black. if three hundred black cars were sold in chicago, how many cars were sold there? show all work

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Which diagram shows lines that must be parallel lines cut by transversal?