For f(x)=2x1 and g (x)=x2-7,find (f-g)(x)

Your f(x) value is a little ambiguous, so I am assuming the value of f(x)=2x-1

(f-g)(x) = 2x-x²+6

Explanation:

f(x)=2x-1

g(x)=x²-7

(f-g)(x)=f(x)-g(x)

          = (2x-1)-(x²-7)

          = 2x-1-x²+7

          = 2x-x²+6

Therefore,

(f-g)(x) = 2x-x²+6

your answer is, orbit around the nucleus

there are no components of a physical goal mentioned on the list of choices that you've provided.