Mary earns $5 per hour as a waitress. last week she took home her regular earnings of $5 per hour plus $186 in tips for a total of $291. how many hours did mary work last week?

Arectangular garden is 5 feet long and 3 feet wide. a second rectangular garden has dimensions that are double the dimensions of the first garden. what is the percent of change in perimeter from the first garden to the second garden?