Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set. 4x - 4y - 5z = -48 4x + 2y + 8z = 98-6x - 4y + 2z = -42
A. {(6, 5, 8)}
B. {(5, -7, -8)}
C. {(7, 8, 7)}
D. {(5, 7, 8)}
Answer: D
Mathematics
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Solve the problem.Find the measure of the indicated exterior angle.
?x = (5n - 18)°, ?y = (n + 10)°, ?z = (160 - 6n)°
A. 142° B. 76° C. 166° D. 96°
Mathematics
Solve the linear programming problem.Maximize 6x1 + 7x2subject to 2x1 + 3x2 ? 12 2x1 + x2 ? 8and x1 ? 0, x2 ? 0
A. maximum = 28 when x1 = 0 and x2 = 4 B. maximum = 38 when x1 = 4 and x2 = 2 C. maximum = 32 when x1 = 3 and x2 = 2 D. maximum = 39 when x1 = 3 and x2 = 3
Mathematics
Solve by factoring and using the principle of zero products.5x2 - 45x + 100 = 0
A. 0, 4, 5 B. 5, 4, 5 C. 4, 5 D. -4, -5
Mathematics
Solve the equation by completing the square.x2 + 4x + 13 = 0
A. 1, -5
B. -2 ± 
i
C. -2 ± 3i
D. 2 ± 3i
Mathematics