Someone please help ??? :,(

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

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?

How to use order of operation in 20 divide by 4 multiply 5 = 1