Semester Review 3: 5.1, 6.3, 7.1

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Front

What is the formula to find the percent of a fraction?

Back

To find the percent of a fraction, divide the numerator by the denominator and multiply by 100.

Front

If you have a total cost and the number of items, how do you find the unit cost?

Back

Divide the total cost by the number of items to find the unit cost.

Front

What does it mean for two ratios to form a proportion?

Back

Two ratios form a proportion if their cross products are equal.

Front

Solve the proportion: 3/4 = x/12. What is x?

Back

x = 9.

Front

Solve the proportion: 5/x = 10/20. What is x?

Back

x = 10.

Front

What is the percent equivalent of the fraction 1/2?

Back

50%.

Front

If a pizza costs $15 and you buy 3 pizzas, what is the total cost?

Back

Total cost = $15 * 3 = $45.

Front

Determine if the ratios 2:3 and 4:6 form a proportion.

Back

Yes, they form a proportion because 2/3 = 4/6.