(2x + 3y)^2– (2x – 3y)^2

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

The value of cos 30° is the same as which of the following?

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?