## Elementary Algebra

$-0.01$
We substitute $x=0.1$ and $y=0.3$ into the expression: $0.2x-0.3y+2xy$ =$0.2(0.1)-0.3(0.3)+2(0.1)(0.3)$ =$0.02-0.09+2(0.03)$ =$0.02-0.09+0.06$ =$-0.07+0.06$ =$-0.01$