Given,
The amount Tim get for his work is 5x^2 - 4x +8.
The amount Melina get for his work is 9x+13.
Required
The total amount of both get for their work.
The total amount is calculated as,
[tex]Total\text{ amount = amount of Tim +amount of Melina}[/tex]
Substituting the values,
[tex]\begin{gathered} Total\text{ amount = 5x}^2-4x+8\text{ +9x+13} \\ =5x^2+5x+21 \\ =5x^2+21+5x \end{gathered}[/tex]
Hence, the total amount of work is 5x^2+21+5x.
