## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$50m+90n+10$
Using the Distributive Property which is given by $a(b+c)=ab+ac,$ the expression, $10(5m+9n+1) ,$ is equivalent to \begin{array}{l}\require{cancel} 10(5m)+10(9n)+10(1) \\\\= 50m+90n+10 .\end{array}