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ECA Review #14

ECA Review #14. Solving Systems of Equations by Graphing. 40 % of the test will deal with linear equations and inequalities. Graph the system of equations below and determine the solution to the system. (4,0). The graph below shows the solution to which system of equations?. [Default]

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ECA Review #14

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  1. ECA Review #14 Solving Systems of Equations by Graphing 40% of the test will deal with linear equations and inequalities

  2. Graph the system of equations below and determine the solution to the system. • (4,0)

  3. The graph below shows the solution to which system of equations? [Default] [MC Any] [MC All]

  4. Which point is the solution to the system of equations below (you may graph each of these) • (-5,1) • (-1,-5) • (5,-1) • (-1,5) [Default] [MC Any] [MC All]

  5. Identify the solution to the system of equations. • (-2,2) • (1,-1) • (2,-2) • No Solution [Default] [MC Any] [MC All]

  6. Which value of b will make the graphs y = -2x + 1 and y = x + b intersect at the point (-2,5)? • -2 • 7 • 5 • 2 [Default] [MC Any] [MC All]

  7. You plant two trees in your backyard. You plant a spruce tree that is initially 2 feet tall and grows 1 foot per year. You also plant an oak tree that is only 6 inches tall, but grows 2 feet per year. Finish writing the system of equations that represent the relationship between the height of the tree (y) and time (x).Spruce tree: y = x + 2 Oak tree: _____________ • y=2x+0.5 • 0

  8. A system of equations has a solution at (-2,4). The equation of one line is y = 2x + 8. If the two lines are perpendicular, what is the equation of the second line? • y=-1/2x+3 • 0

  9. Your parents have decided to paint the house for the summer, and you are going to rent a cherry-picker. One company will rent it to you for $250 plus $10 per hour, while another company will rent it to you for $100 plus $15 per hour. After how many hours will the cost be the same for either company? • 30 • 0

  10. One company will rent a cherry-picker to you for $250 plus $10 per hour, while another company will rent it to you for $100 plus $15 per hour. Which system of equations describes this situation? & & [Default] [MC Any] [MC All] & &

  11. How many solutions are there to a system of equations that have the same slope and different y-intercepts? • none

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