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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

2. Solving Systems of Linear Equations by Substitution

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Exercise 38 Page 228

Remove the parentheses and combine like terms.

- 23

Practice makes perfect

To find the difference we can combine like terms. We will remove the parentheses and then group the like terms. Notice that whenever a parentheses is preceded by subtraction, we can treat it as though we are distributing -1.

(t-8)-(t+15)

Distribute -1

(t-8)-t-15

Remove parentheses

t-8-t-15

Subtract terms

- 23

Our expression cannot be simplified any further. Therefore, - 23 is the difference we were looking for.

Subchapter links

Communicate Your Answer p.223

Monitoring Progress p.224-226

Exercises p.227-228