Let's solve each expression to see which one is equal to the given expression.
[tex]5.03(\frac{29.25}{7.8})+\frac{1}{2}=5.03(3.75)+0.5=18.86+0.5=19.36[/tex]Let's find each expression are equivalent to the given on
[tex]\begin{gathered} \\ 0.5+5.03\times3\frac{3}{4}=0.5+18.86=19.36 \\ 5.03(29\frac{1}{4}\colon7\frac{4}{5})+0.5=5.03(\frac{29.25}{7.8})+0.5=19.36 \\ 5.03(3.75+0.5)=5.03(3.8)=19.11 \\ (5.03\times29.25)\colon(7.8+\frac{1}{2})=\frac{147.13}{8.3}=17.73 \end{gathered}[/tex]As you can observe, expressions A and B are equivalent to the given one.