
To complete:Given statement in the question with “intersect, are parallel or coincide”.

Answer to Problem 17OE
The correct answer is intersect.
Explanation of Solution
“Why do you think the linear combination method is more efficient than substitution in solving in example 3?”
As shown in example 3,the system has 2 equations
Here, since
It means that the system is consistent and the 2 lines will have a common point of intersection therefore it will be much easier and quicker to solve the 2 equations with the linear combination method. Hence it is because the lines will intersect it was decided to use the linear combination method.
Chapter 3 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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