Which equation is an identity? a. 3(x - 1) = x + 2(x + 1) + 1
b. x - 4(x + 1) = -3(x + 1) + 1
c. 2x + 3 = 1/2 (4x + 2) +2
d. 1/3 (6x – 3) = 3(x + 1) –x2

In factoring by grouping, what would you have for step 3 for the following? step 1: x^3 +5x^2 +4x+20 step 2: x^2 (x+5)+4(x+5) step 3: ?

True or false look at the picture pls : /

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)