If g(x) = 2x - 1, then g(4)=

if f(x)=-5x then f(-3)=

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Is this a polynomial function? i need to know asap

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.