The equations x - 2y = 4, 4x +5y = 8, 6x - 5y = 15, and x + 2y = 0 are shown on the graph below. Which system has solution of approximately (1.8, -0.9)?

Also is there a way to solve these questions quicker. I have 6 more like this and I only 16 min. left.

Questions 7-8. use the following table to answer. year 2006 2007 2008 2009 2010 2011 2012 2013 cpi 201.6 207.342 215.303 214.537 218.056 224.939 229.594 232.957 7. suppose you bought a house in 2006 for $120,000. use the table above to calculate the 2013 value adjusted for inflation. (round to the nearest whole number) 8. suppose you bought a house in 2013 for $90,000. use the table above to calculate the 2006 value adjusted for inflation. (round to the nearest whole number)