Lesson 3.2 Quiz - How could you use substitution to find...

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Lesson 2 Quiz Linear Systems Results of the quiz. 1. What steps can you use to solve the system using the method of elimination? CORRECT: Multiply 4 x + 5 y = 53 by 2 and multiply 7 x + 2 y = 59 by –5. Then add. 2. How can you rewrite the system to solve it using the method of elimination? CORRECT: 3. In a group of 42 adults and children who attended a ball game, there were twice as many children as adults. If a represents the number of adults, and c represents the number of children, then the following linear system models the numbers of adults and children who attended the game.
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Unformatted text preview: How could you use substitution to find the number of adults who attended the game? CORRECT: Substitute 2 a for c in the equation a + c = 42. 4. Which of the following steps uses the elimination method to first solve this system for y ? CORRECT: Multiply both sides of the equation 9 x + 4 y = 20 by 2 and then add. 5. How could you solve this system by substitution? CORRECT: Substitute 6 for d into the equation 3 c + 5 d = 2. You got 5 out of 5 correct....
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This note was uploaded on 10/07/2010 for the course MATH 101 taught by Professor Gonzalez during the Spring '10 term at Moorpark College.

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