what is the sum of rocks between Pablo and Javier?

Answer:
4r-5
Explanation:
Maria collected r rocks.
Javier collected twice as many rocks as Maria = 2r
Pablo collected 5 less than Javier = 2r - 5
Therefore, the sum of rocks between Pablo and Javier
[tex]\begin{gathered} =2r+2r-5 \\ =4r-5 \end{gathered}[/tex]For reference: