Respuesta :

thepingu

Answer:

392

Step-by-step explanation:

If we have the expression [tex]7m+3mn[/tex] and we know the values of m and n, we can just substitute inside the expression and solve.

[tex]7\cdot8 + 3\cdot8\cdot14\\\\56+336\\\\392[/tex]

Hope this helped!

JustABookishFangirl

Answer:

392 is the correct answer