Given the following expression:
[tex]\frac{2}{5}-\frac{1}{2}(7x9)[/tex]we can find the product inside the parenthesis first to get the following:
[tex]\frac{2}{5}-\frac{1}{2}(7x9)=\frac{2}{5}-\frac{1}{2}(63)=\frac{2}{5}-\frac{63}{2}[/tex]then, doing the substraction, we get:
[tex]\frac{2}{5}-\frac{63}{2}=\frac{4-315}{10}=-\frac{311}{10}[/tex]therefore, the simplified expression is -311/10
