The video tutorial teaches how to write a percent markup expression using a double number line. It explains the concept of markup as a percentage added to the cost of an item to ensure profit. The tutorial uses a double number line to illustrate the relationship between percents and decimals. It guides students through calculating a 30% markup using algebraic expressions, represented as 1.30x, where x is the cost of an item. The video concludes by showing how to apply this markup to determine the selling price of t-shirts for a class fundraiser.

What does a 10% markup translate to in decimal form?

• 10.00

• 0.01

• 0.10

• 1.00

Why is markup added to the cost of an item?

• To decrease the selling price

• To increase the number of items sold

• To ensure a profit is made

• To reduce the cost price

If the cost of a t-shirt is represented by 'x', how would you express a 30% markup?

• 0.30x

• 1.30x

• 3.00x

• 0.03x

How would you calculate the selling price of a t-shirt with a 30% markup if the cost is known?

• Add 30 to the cost

• Subtract 0.30 from the cost

• Multiply the cost by 1.30

• Multiply the cost by 0.30

What is the total percentage of the cost when a 30% markup is added?

• 100%

• 130%

• 30%

• 300%