[tex]\text{We know that Aunt Mary drove 325 miles}\\\\\text{We also know this took her 5 hours}\\\\\text{We need to find how fast she was going, in miles per hour}\\\\\text{To do this, divide 325 by 5 to see how much she drove in 1 hour}\\\\325\div5=65\\\\\text{This means that she was going 65 mph}\\\\\boxed{\text{65 mph}}[/tex]
