Solve the system using the substitution method. If the system has no solution or an infinite number of solutions, state this.x - 3y = -39 y = -4x
A. (-3, 12)
B. (3, -12)
C. (-3, 11)
D. (-4, 16)
Answer: A
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Solve the system using substitution.
A. (-6, 24) B. (24, -6) C. all ordered pairs that solve 4x - 2y = 108 D. no solution
Solve the problem.At a fixed temperature, the resistance R of a wire varies directly as the length l and inversely as the square of its diameter d. If the resistance is 1.25 ohm when the diameter is 1 mm and the length is 250 cm, what is the resistance when the diameter is 2 mm and the length is 720 cm?
A. 225 ohm B. 0.9 ohm C. 1.8 ohm D. 180 ohm
Use Cramer's rule to solve the system.4x + 3y - z = 31 x - 3y + 2z = -54x + y + z = 29
A. {(7, 6, 7)} B. {(5, 5, 6)} C. {(4, -7, -6)} D. {(4, 7, 6)}
Solve the application problem.Find the lengths of the legs of the right triangle.
A. 6, 9 B. 9, 18 C. 18, 24 D. 9, 12