If a+b+c=-2 and x+y=10, what is -9a+2x-9b-9c+2y ?

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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?