Write an expression for the amount of change you will get when you pay for a purchase p with a $20 bill. make a table for the amount of change you will get for purchases of $11.59, $17.50, $19.00 and $20

Change received = $20 - p ⇒ this is the expression

The table:

Purchase      Paid                Change

$11.59           $20        $20 - $11.59 = $8.41
$17.50           $20       $20 - $17.50 = $2.50
$19.00          $20        $20 - $19.00 = $1.00
$20.00         $20        $20 - $20 = $0

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