Solve the system of equations by using an inverse matrix.-4x - 3y - z = -36 x + 7y - 9z = -68 8x + y + z = 58
A. (-6, 1, 12)
B. (6, 1, 9)
C. (6, 9, 1)
D. ?
Answer: B
Mathematics
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Use the quadratic formula to find all solutions in the interval 
to the nearest tenth of a degree.
?
?
A. 15.9°, 163.3° B. 16.1°, 163.5° C. 16.1°, 163.7° D. 16.3°, 163.7° E. 16.3°, 163.5°
Mathematics
Find the product.(4y - 5)(16y2 + 20y + 25)
A. 64y3 - 125 B. 64y3 - 100y2 - 125 C. 64y3 + 125 D. 64y3 + 100y2 - 125
Mathematics
Find all solutions of the equation in the complex number system.(x + 7)(x - 3i)(x + 3i) = 0
A. {-7, 3, -3} B. {-7, 3i, -3i} C. {-7} D. {-7i, 3i, -3i}
Mathematics
Solve the system of equations. Let z be the parameter.-3x - 6y - 5z = -3-5x + y + 3z = 7
A. 
B. (39 - 13z, -36 + 39z, z)
C. 
D. 
Mathematics