Si f(x)=1/x demuestra que f(a) - f(c)=f(ac/c-a)

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

What statement is true? 2x^2-9x+2=-1