# Simplify Variable Expressions Involving Integer Addition

## Combine like terms.

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Practice Simplify Variable Expressions Involving Integer Addition

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Wages and Tips

Credit: Alan Light
Source: http://www.flickr.com/photos/alan-light/7724600476
License: CC BY-NC 3.0

Have you ever eaten in a restaurant with wait staff? Servers in restaurants get paid a base wage, but they also earn tips. To figure out their earnings on a given night, they must add their hourly wage and their tips.

#### Fee for Service

Many teens and college students work in restaurants as waiters and waitresses. They take customers’ orders, bring food and drinks to the table, and clean up when diners leave. People tip their servers based on the job they do.  Good servers can make hundreds of dollars in a four-to-six hour shift. Beginning servers usually make closer to minimum wage.

Every night, the servers must add up their tips so that they can report them for taxes. If they’re not making much in tips, their managers may talk to them. Servers who provide consistently bad service and receive very few tips may lose their jobs.

Credit: Evan Blaser
Source: http://www.flickr.com/photos/87989454@N00/5731456335
License: CC BY-NC 3.0

If you eat out at restaurants, you should learn to calculate tips in your head. Look at the total cost of your meal. To calculate a 20% tip, move the decimal point one place to the left. Then double the amount. So, if your meal cost \$4.50, a 20% tip would be 90 cents. People tend to give high tips to servers who do excellent jobs. If a server is particularly bad, a diner might give a low tip.

See for yourself: http://money.cnn.com/pf/features/lists/tipping/

#### Explore More

Check out the first link below for tipping guidelines from a former waitress. Watch the videos to see two waitresses surprised by very generous tips.

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