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

$4$
$\bf{\text{Solution Outline:}}$ To evaluate the given expression, $\dfrac{2a}{5} ,$ substitute the given value $a=10.$ $\bf{\text{Solution Details:}}$ Substituting $a=10,$ the given expression evaluates to \begin{array}{l}\require{cancel} \dfrac{2a}{5} \\\\= \dfrac{2(10)}{5} \\\\= \dfrac{20}{5} \\\\= 4 .\end{array}