Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set.x + y = 1x + y = 8
A. {(0, 9)}
B. Cramer's rule does not apply since D = 0; ?
C. Cramer's rule does not apply since D = 0; {(8 - y, y)}
D. {(1, 8)}
Answer: B
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A. 
B. 
C. 
D. 
Given functions f and g, perform the indicated operations.f(x) = 3 - 7x,g(x) = -5x + 7Find f + g.
A. -5x + 3 B. -2x C. -12x + 10 D. -2x + 10
To find the distance across a river a surveyor chooses points A and B ,100 m apart and a reference point C on the other side of the river. Approximate the distance, b between A and C given that ?A = 93° and ?B = 62°.
What will be an ideal response?
A granular substance such as sand naturally settles into a cone-shaped pile when poured from a small aperture. Its height depends on the humidity and adhesion between granules. The angle of elevation of a pile, ?, is called the angle of repose. If the height of a pile of sand is 11 feet and its diameter is approximately 34 feet, determine the angle of repose. Round answer to nearest degree.
A. 29o B. 30o C. 31o D. 32o E. 33o