The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. ?
B. {(15, 7)}
C. {(16, 9)}
D. {(17, 9)}
Answer: D
You might also like to view...
Write the first five terms of the arithmetic sequence whose first term, a1, and common difference, d, are given.a1 = 5; d = 2
A. 0, 5, 7, 9, 11 B. 5, 7, 9, 11, 13 C. 7, 9, 11, 13, 15 D. 5, 6, 7, 8, 9
Multiply.(4x - 10)(x + 5)
A. 4x2 + 9x - 50 B. 4x2 + 10x - 50 C. x2 + 10x + 9 D. x2 - 50x + 10
Find the Taylor series for the given function. Give the interval of convergence.f(x) = 
A. 2x - 2 ? 3x2 + . . . + (-1)n2 ? 3nxn+1 + . . . ; 
B. 2x - 2 ? 3x2 + . . . + (-1)n2 ? 3nxn+1 + . . . ; (-3, 3)
C. 2x + 2 ? 3x2 + . . . + 2 ? 3nxn+1 + . . . ; (-3, 3)
D. 2x + 2 ? 3x2 + . . . + 2 ? 3nxn+1 + . . . ; 
Solve the problem.A group of campers recorded the daily low temperatures for the seven days of their trip. The temperatures they recorded are given in the table. Calculate the average daily low temperature for the seven-day period, rounded to the nearest integer. 
A. 3°F B. 2°F C. 4°F D. 5°F