Let f(x) = 4x + 3 and g(x) = -2x + 5. find (g. f) (5)

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Can someone answer this question? : )

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.