The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. {(65, -22, 5)}
B. {(60, -20, 5)}
C. ?
D. {(60, -22, 5)}
Answer: A
Mathematics
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Find the absolute value.
A. 0
B. 
C. - 
D. ± 
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Evaluate the expression by first changing the form. Verify the answer by use of a calculator. sin 100° cos 40° - cos 100° sin 40°
A. 
B. 
C. 
D. 
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Write the improper fraction as a mixed or whole number.
A. 6
B. 7
C. 5
D. 6
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Solve the problem.A bullet is fired with a muzzle velocity of 1169 ft/sec from a gun aimed at an angle of 12° above the horizontal. Find the horizontal component of the velocity.
A. 1143 ft/sec B. 986.5 ft/sec C. 243.0 ft/sec D. 248.5 ft/sec
Mathematics