Each of three students wrote an equation. • nikole wrote 5 2 = 21 8 4 • erik wrote 5.14 = 21 4 • keisha wrote 4 1 = 21 5 4 which of these students wrote an equation that is true? staar 2013 a. nikole only. b. nikole and erik only. c. keisha only. d. nikole, erik, and keisha

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Find the distance between the pair of points a(-1,8) and b(-8,4)

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x? y? z? , with vertices x? (4, -2), y? (4, -3), and z? (1, -4). the type of transformation that triangle xyz undergoes is a . triangle x? y? z? then undergoes a transformation to form triangle x? y? z? , with vertices x? (4, 2), y? (4, 3), and z? (1, 4). the type of transformation that triangle x? y? z? undergoes is a .