given the parent funtion f(x)=3x+2 and g(x)=5^x -10, what is g(x)-f(x)
a) g(x)-f(x)=5^x-8-3x
b) g(x)-f(x)=5^x-12-3x
c) g(x)-f(x)=3x-8-5^x
d) g(x)-f(x)=3x+12-5^x