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. (73, -28, 5)
B. No solution
C. (68, -26, 5)
D. (68, -28, 5)
Answer: A
Mathematics
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For the equation below, find all degree solutions in the interval 
. Give your answer in degrees. If rounding is necessary, round to the nearest tenth of a degree. Use your graphing calculator to verify each solution graphically.
?
What will be an ideal response?
Mathematics
Identify whether the equation is a linear equation in one variable. Answer "is" or "is not."
= 8
A. is B. is not
Mathematics
Add or subtract. Express the answer as a mixed number.
A. 19
B. 18
C. 17
D. 18
Mathematics
Solve the equation.3x = 81
A. 
B. 
C. 
D. 
Mathematics