Solve the system of equations. x + y + z = -12 x - y + 5z = -143x + y + z = -20
A. {(-3, -4, -5)}
B. ?
C. {(-4, -5, -3)}
D. {(-3, -5, -4)}
Answer: C
Mathematics
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Determine the quadrant containing ?.csc ? < 0 and cos ? < 0
A. I B. II C. III D. IV
Mathematics
Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give exact answers with rational denominators.Find cos A when a = 7 and b = 6.
A. 
B. 
C. 
D. 
Mathematics
Subtract the following binary numbers and check your result by decimal subtraction.
A. 110101 B. 111011 C. 1010101 D. 1010011 E. 1000101
Mathematics
Solve the equation by the method of your choice. Simplify irrational solutions, if possible.(x + 4)(x + 1) = 28
A. {-4, -1} B. {1, 4} C. {-3, 8} D. {-8, 3}
Mathematics