PLEAS HEL! Which equation illustrates the associative property?
1. x + y + z = x+y+z
2. x(y + 2) = xy + XZ
3. x+y+z= z + y + x
4. (x + y) + z = x + (y + z)

The number of electoral votes each state is assigned is determined by the size of its population every ten years. the chart shows the number of electoral votes california was assigned each decade of the past century. what is the 3rd quartile of the data?

Name the most appropriate metric unit for each measurement

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?