If y varies directly as x and y is 20 when x is 4 what is the constant of variation for this relation

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

3382-299=3383- ? fill in the blank?

Which of the following is the true for f(x) = 5cos