Respuesta :

Add the quantities of regular milk and soy milk consumed;

[tex]\begin{gathered} \text{Total}=2\frac{5}{8}+2\frac{7}{8} \\ \text{Total}=\frac{21}{8}+\frac{23}{8} \\ \text{Total}=\frac{21+23}{8} \\ \text{Total}=\frac{44}{8} \\ \text{Total}=\frac{11}{2} \\ \text{Total}=5\frac{1}{2} \end{gathered}[/tex]

Therefore, they drank 5 1/2 cartons of milk altogether

RELAXING NOICE
Relax