Sarah is driving. her distance in km from tempe after t hours of driving is given by x = d(t) = 13 + 57t.

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

Can someone answer this question for me

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.