The first 4 terms of a 10-term geometric series are listed below. Which expression represents the sum of the series?
25 +9+4+10+ ... + 210

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?

Using elimination, what is -4x+2y=-12 4x+8y=-24

What are the domain and range of f(x)= -log5(x+2)