Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x = 2, y = 3, z = -7; (2, 3, -7)
B. x = 1, y = -3, z = -16; (1, -3, -16)
C. x = 5, y = 
, z = -3; 
D. x = 1, y = 3, z = -4; (1, 3, -4)
Answer: D
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A. (2, 5) B. (-2, 4) C. (-3, 5) D. No solution
Translate the sentence into a mathematical statement. Do not solve the equation.If 5 times a number is added to -7, the result is equal to 12 times the number.
A. 17x - 12x = 7 B. 4x + (-7) = 12x C. 5x + (-7) = 12x D. 12(5x - 7) = -7
Write the described ratio in fractional form and simplify.Bob is 56 years old, and Susan is 64 years old. Write as a ratio--Bob's age : Susan's age.
A. 
B. 
C. 
D. 
Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = 3xx2
A. 3xx2 + 1(2 ln 3x ) B. xx2 + 1 ln 3x C. 3xx2 + 1(2 ln 3x + 1) D. x(2 ln 3x +1)