7th Grade Warm Up (December)

Front

What is sales tax?

Back

Sales tax is a percentage of the purchase price that is added to the cost of goods and services, collected by the seller and paid to the government.

Front

How do you calculate sales tax?

Back

To calculate sales tax, multiply the purchase price by the sales tax rate (as a decimal). For example, for a $100 item with a 4% sales tax, the tax is $100 x 0.04 = $4.

Front

What is the formula to find the missing side of similar figures?

Back

The ratio of corresponding sides of similar figures is equal. If two figures are similar, then a/b = c/d, where a and b are sides of one figure and c and d are sides of the other.

Front

How do you solve a linear equation like 3x - 7 = 32?

Back

To solve for x, first add 7 to both sides to get 3x = 39, then divide both sides by 3 to find x = 13.

Front

What does it mean to mark down an item by a percentage?

Back

Marking down an item by a percentage means reducing its original price by that percentage. For example, a 20% markdown on a $150 item reduces the price by $30.

Front

How do you calculate the final price after a markdown?

Back

To calculate the final price after a markdown, subtract the amount of the markdown from the original price. For example, if an item costs $150 and is marked down by $30, the final price is $150 - $30 = $120.

Front

What is a tip and how is it calculated?

Back

A tip is a small amount of money given to service workers for their service. It is often calculated as a percentage of the total bill.

Front

How do you calculate a tip based on a percentage?

Back

To calculate a tip, multiply the total bill by the tip percentage (as a decimal). For example, for a $27.31 bill with a 23% tip, the tip is $27.31 x 0.23 = $6.28.

Front

What is the importance of understanding percentages in real life?

Back

Understanding percentages is important for making informed financial decisions, such as calculating sales tax, tips, discounts, and interest rates.

Front

What is the relationship between similar figures?

Back

Similar figures have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are in proportion.