Answer:
$5.92
Explanation:
Her bill is $11.83 but she gave a tip of $2.25 so you add those 2 numbers together:
$11.83 + $2.25 = $14.08
Then she paid with a 20 dollar bill so you subtract that from 14.08.
$20 - $14.08 = $5.92
So Elva has $5.92 left from her twenty-dollar bill.