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 triple, if possible.
A. (23 + 12z, -14 - 4z, z) 
B. (23 + 11z, -7 - 4z, z) 
C. (23 + 11z, -14 - 4z, z) 
D. No solution
Answer: B
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The scores on a 30-point multiple-choice exam are given in the following frequency table:
The first quartile on the exam is
A. 24.5. B. 25.5. C. 25. D. 24. E. none of these
Calculate the current ratio and the acid-test ratio. Is the company healthy based on the guidelines given in the text?Current assets: $525,000Current liabilities: $182,000Liquid assets: $249,000
A. Current ratio = 2.11 which is fine Acid-test ratio = 1.37 which is too low B. Current ratio = 1.37 which is too low Acid-test ratio = 2.88 which is fine C. Current ratio = 2.88 which is fine Acid-test ratio = 2.11 which is fine D. Current ratio = 2.88 which is fine Acid-test ratio = 1.37 which is fine
Find the distance between two points given their coordinates.Find the distance between points R and S on a number line, with coordinates -2 and 4, respectively.
A. d(R, S) = 6 B. d(R, S) = -2 C. d(R, S) = -6 D. d(R, S) = 2
Find an expression for the nth term of the arithmetic sequence.-7, -3, 1, 5, 9, . . .
A. an = -4n + 11 B. an = 4n - 11 C. an = -7 + 4n D. an = 4n + 11