Answer: [tex]\frac{3}{5} f+\frac{27}{5}[/tex]
Step-by-step explanation:
Three-fifths of the sum of 9 and f is [tex]\frac{3}{5} (9+f)[/tex]=[tex]\frac{27}{5} +\frac{3}{5} f[/tex]=[tex]\frac{3}{5} f+\frac{27}{5}[/tex]
