After 15 years mary age will be fourtimes of her present age find her present age

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?

4+(2+x) can you me solve this problem

What is the inverse of the function f(x) = 2x + 1?