Solve the system of equations by finding the reduced row echelon form of the augmented matrix. write the solutions for x and y in terms of z comma where z can be any number. startlayout left-brace 1st row 1st column 3 x plus y plus 4 z 2nd column equals 3rd column -3 2nd row 1st column negative x plus y plus 4 z 2nd column equals 3rd column 17 endlayout

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

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Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?