What is 2x-4. I really don’t understand

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is the absolute value of the complex number -4-sqrt2i