# Tax and Tip

Warmup

Activity #1

Work out what the Tip would be.

In the applet below, the red slider is the full amount, and it is represented by the red box. This is 100 %. Observe on the red slider that the total amount is 5, and 10% has been selected as the tax or tip. This percentage of the total amount is displayed in the box. Follow the instructions below to interact with the applet and see how the values change.

• Move the red slider back and forth to observe that there is no change because it is the full amount.
• Move the green slider back and forth to observe what portion of the total is being taken.
• Now, check the box at the top and play with the sliders to see the quantities that change.
• Check the answer box to see how tax and tip are calculated.
• Now, create your own word problem and use this applet to solve the problem.Â â€‹

Activity #2

Calculate Tax & Tip.

Jada has a meal in a restaurant. She adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. • Study the menu and answer the questions that follow. • The tax rate at the restaurant below is 9.5%. Look at it close and answer the question below. • The tax rate at the restaurant below is 9.5%. Look at it close and answer the question below. Elena’s cousins went to a restaurant. The part of the entire cost of the meal that was tax and tip together was 25% of the cost of the food alone. What could the tax rate and tip rate be? Activity #3 Complete a Table of Tax Rate. Different cities have different sales tax rates. Here are the sales tax charges on the same items in two different cities. • Complete this table of City 1. • Complete this table of City 2. Here below is the sales tax on the same items in City 3. • Study the table and answer the questions that follow. For the sales tax on the laundry soap, Kiran says it should be$0.84. Lin says it should be \$0.87. Do you agree with either of them? Explain your reasoning.

Challenge #1

In a city in Ohio, the sales tax rate is 7.25%. Complete the table to show the sales tax and the total price including tax for each item.

Challenge #2

The sales tax rate in New Mexico is 5.125%. Select all the equations that represent the sales tax, , you would pay in New Mexico for an item of cost  c?

Challenge #3

Here are the prices of some items and the amount of sales tax charged on each in Nevada.

(2.) Write an expression for the amount of sales tax charged, in dollars, on an item that costsdollars.

Quiz Time