Apoll of 500 randomly selected voter was recently minister responders rescue approve of president bush's policies relating to the war in iraq? suppose that we know that 40% of all registered voters approve the policies. how many voters would you expect to respond yes?

Find the solution of system of equation y= x-4 y=4x+2

The surface area of the triangular prism is .

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.