Eureka Lesson 8 and Zearn lesson 9 Flashcard

Front

What is cross multiplication in proportions?

Back

Cross multiplication is a method used to solve proportions by multiplying the numerator of one fraction by the denominator of the other fraction, setting the two products equal to each other.

Front

What is the solution to the proportion 15/25 = x/5?

Back

x = 3.

Front

How do you solve for a in the equation 12a = 107?

Back

a = 107/12.

Front

What is the value of k in the equation 5k = 825?

Back

k = 165.

Front

How do you solve for c in the equation 2c = -7?

Back

c = -7/2.

Front

What is a proportion?

Back

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

Front

What is the formula for finding the cross product of two fractions a/b and c/d?

Back

The cross product is ad and bc, and the equation states that ad = bc.

Front

If 42/x = 6/28, what is the value of x?

Back

x = 28.

Front

What does it mean to solve for a variable?

Back

To solve for a variable means to find the value of that variable that makes the equation true.

Front

What is the first step in solving a proportion?

Back

The first step is to cross multiply the two fractions.