6
Explanations:The given absolute value expression is:
Substitute x = 2.1, y = 3, z = -4.2 into the given expression:
[tex]|2(2.1)+(-4.2)|+2(3)[/tex]This can be simplifed as:
[tex]|2(2.1)-4.2|+6[/tex][tex]|4.2-4.2|+6[/tex]Since |4.2-4.2| = 0, the expression above becomes:
0 + 6
= 6
Therefore, the absolute value of the expression, after simplification, is 6
