#### Answer

$\frac{1}{2}$ acres

#### Work Step by Step

She purchased $\frac{9}{10}+\frac{3}{10}=\frac{9+3}{10}=\frac{12}{10}$ acres of land.
To calculate how much land she covered with squash, we can take the difference between the total amount of land purchased and the amount of land covered with carrots.
$\frac{12}{10}-\frac{7}{10}=\frac{12-7}{10}=\frac{5}{10}=\frac{5\div5}{10\div5}=\frac{1}{2}$ acres of land.