Which ordered triple represents all of the solutions to the system of equations shown below? 2x ­- 2y ­- z = 6 -x + y + 3z = -­3 3x ­- 3y + 2z = 9 a) (­-x, x + 2, 0) b) (x, x ­- 3, 0) c) (x + 2, x, 0) d) (0, y, y + 4)

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Which of the following can be used to explain a statement in a geometric proof?

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score