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)

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?