Example 1.63 from Elementary Algebra, 1.4 Multiply and Divide Integers

Multiply and Divide Integers: example 1.63

The Mustangs football team received three penalties in the third quarter. Each penalty gave them a loss of fifteen yards. What is the number of yards lost?

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

The Bears played poorly and had seven penalties in the game. Each penalty resulted in a loss of 15 yards. What is the number of yards lost due to penalties?

How did it go?

Step 1. Read the problem. Make sure all the words and ideas are understood.
Step 2. Identify what we are asked to find.	the number of yards lost
Step 3. Write a phrase that gives the information to find it.	three times a 15-yard penalty
Step 4. Translate the phrase to an expression.	$3 (−15)$
Step 5. Simplify the expression.	$−45$
Step 6. Answer the question with a complete sentence.	The team lost 45 yards.

Step 1. Read the problem. Make sure all the words and ideas are understood.
Step 2. Identify what we are asked to find.	the number of yards lost
Step 3. Write a phrase that gives the information to find it.	three times a 15-yard penalty
Step 4. Translate the phrase to an expression.	$3 (−15)$
Step 5. Simplify the expression.	$−45$
Step 6. Answer the question with a complete sentence.	The team lost 45 yards.

Multiply and Divide Integers: example 1.63

Solution

Your turn

Multiply and Divide Integers: example 1.63

Solution

Your turn