Unit 3 Flashcard Review

Front

What is the formula to calculate the total cost including tax?

Back

Total Cost = Original Price + (Original Price × Tax Rate)

Front

If Mike spends $192 on groceries and the tax rate is 7%, how much does he spend in total?

Back

Total = $192 + ($192 × 0.07) = $205.44

Front

What is the Pythagorean theorem used for?

Back

The Pythagorean theorem is used to determine if a triangle is a right triangle by checking if a² + b² = c², where c is the hypotenuse.

Front

How do you determine if three lengths can form a right triangle?

Back

Check if the square of the longest side equals the sum of the squares of the other two sides.

Front

What is a tip and how is it calculated?

Back

A tip is a sum of money given to someone for their service, often calculated as a percentage of the total bill.

Front

If Janice's haircut cost $59 and she gives a 22% tip, how much is the tip?

Back

Tip = $59 × 0.22 = $12.98

Front

What does a percentage off mean in terms of discounts?

Back

A percentage off indicates how much of the original price is deducted from the total price.

Front

If a sweater costs $45 and is 35% off, how much do you save?

Back

Savings = $45 × 0.35 = $15.75

Front

What is the formula to calculate the percentage of a number?

Back

Percentage = (Part / Whole) × 100

Front

How do you find the missing side of a triangle using the Pythagorean theorem?

Back

If you know two sides, use a² + b² = c² to solve for the missing side.