What's 5+5+5+5+5+5? and then times 1 ?

Find the length of cu, the triangles are similar.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

Larry wants to buy some carpeting for his living room. the length of the room is 4 times the width and the total area of the room is 16 square meters. what is the length of the living room