Chapter R - Elementary Algebra Review - R.1 Introduction to Algebraic Expressions - R.1 Exercise Set - Page 938: 49

$36$

Using the order of operations on real numbers and the concepts of the absolute value of a number, the given expression, $ |6(-3)|+|(-2)(-9)| ,$ evaluates to \begin{array}{l}\require{cancel} |-18|+|18| \\\\= 18+18 \\\\= 36 .\end{array}