The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered pair, if possible.
A. (5, 4)
B. No solution
C. (6, 6)
D. (7, 6)
Answer: D
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Solve the problem.The Mathematics Department is holding an election for department chair. Each member ranks the candidates from first to third. The voter profile below shows the results of the ballots with candidates Clark (C), Jones (J), and Smith (S). 
Determine the winner using the pairwise comparison method and state whether the winner received a majority of votes.
A. Smith; yes B. Jones; yes C. Jones; no D. Smith; no
Simplify the expression by using the order of operations.240 ÷ 8 - 4
A. 228 B. 60 C. 236 D. 26
Express the phrase as a ratio in lowest terms.9 yd to 8 ft
A. 
B. 
C. 
D. 
Write any percent as a decimal and any decimal as a percent.At a certain company 17.9% of the employees have engineering degrees.
A. 179 B. 1.79 C. 0.179 D. 0.0179