Question 18 correct 875 points out of 875 question 19

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Question 18 Correct 8.75 points out of 8.75 Solve the system using Gaussian elimination or Gauss­Jordan elimination. 5 x + 9 z = ­16 + 6 y 8 x = 7 y + 7 z ­ 141 8 z = ­2 y ­ 2 x + 42 Select one: a. {(5, 8, ­6)} b. {(­8, 5, 6)} c. {(5, ­8, 6)} d. {(8, ­5, 6)} The correct answer is: {(­8, 5, 6)}
Question 19 Correct 8.75 points out of 8.75 The solution set to a system of dependent equations is given. Write three ordered triples that are solutions to the system. Answers may vary. Select one:
1/11/2019 Graded Exam #4 Question 20 Correct 8.75 points out of 8.75 Solve the system using Gaussian elimination or Gauss­Jordan elimination. ­2 x ­ y + 3 z = 13 x ­ 3 y ­ 3 z = ­4 Select one:
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