# 9411 Opener Test Day

## Quiz by Michelle Bagley

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10 questions

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- Q1You are solving a system of equations and this is the final answer: 0 + 0 = 0. What does that mean?parallel lines; no solutionnot possible to get this final answerone solution: (0, 0)same line; infinitely many solutions30s
- Q2You are solving a system of equations and this is the final answer: 0 - 0 = -4. What does that mean?one solution: (0, 0)same line; infinitely many solutionsnot possible to get this final answerparallel lines; no solution30s
- Q3You are solving a system of equations and this is the final answer: 2y = 0. What does that mean?one solution; (0, 0)same line; infinitely many solutionsparallel lines; no solutionone solution; y-coordinate is 030s
- Q4Select the method of solving equations that we have NOT studied in our class.graphingcombinationssubstitutionrow reduction30s
- Q5What method would you use to solve this system of equations and why?Combinations because you can multiply the top row by 2 and the bottom row by 3.Elimination because adding the equations together will eliminate the y's.Addition because 3x + 2x = 5x.Substitution because there is an isolated variable.30s
- Q6What method would you use to solve this system of equations and why?Elimination because adding the equations together will eliminate the y's.Substitution because there is an isolated variable.Combinations because you can multiply the bottom row by -2.Graphing because it is so much fun.30s
- Q7What does the graph of y = 8 look like?A vertical line that goes through 8 on the x axis.A diagonal line with a y-intercept of 8.A diagonal line with a slope of 8.A horizontal line that goes through 8 on the y axis.30s
- Q8Solve this system of equations.not enough info(-27, 18)no solution(18, -27)30s
- Q9Which of these is a possible solution to the inequality y > 3x + 2 ?(1, 5)(2, 7)(-3, -7)(0, 4)60s
- Q10What is true about parallel lines?Different slopes and different y-intercepts.Different slopes and same y-intercepts.Same slope and the same y-intercepts.Same slope but different y-intercepts.60s