Math 120, Fall 2007, Review for Test #2
Skills essential for success on Test #2: 1. Solving systems of equations by graphing, and by substitution and elimination. 2. Applications of linear systems: motion and mixture problems 3. Understanding the rul
Answers to practice problems on Test #2 Review
1. a) (-2, 5); b)
25 23 3
,
11 23
; c) inconsistent (the lines are parallel)
2. 8x 7 x 5 2x 9x ; leading coefficient: -8; degree: 7 3. a) 3x 3 x 2 16 b) 9x 3 9x 4 4. a) 4 x 7 y 3 b) 4 x 3 y 4 3 5. a)
Math 120, fall 2002, Test 2a
Name: _ You must show your work for every problem, including the ones that are multiple choice.
Answer word problems in complete sentences and include appropriate units.
Part I (5 points each)
1. Which of the ordered pai