Need help with this problem.

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

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)