Solve the polynomial equation in the complex numbers.3x3 - x2 - 21x + 7 = 0
A. {- 
, 
, - 
}
B. {3, 
, -
}
C. {-3, 
, - 
}
D. {
, 
, - 
}
Answer: D
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Determine whether or not the function is one-to-one.f(x) = 
A. Yes B. No
Find the intersection.8x - 4y - 6z = 6, -6x - 4y + 3z = 7
A. x = -36t - 
, y = 12t - 
, z = -56t
B. x = 2016t - 4, y = -672t - 92, z = 56t
C. x = 36t + 4, y = -12t + 92, z = 56t
D. x = -36t - 4, y = 12t + 92, z = 56t
Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.82x = 3.9
A. {0.33} B. {1.31} C. {1.30} D. {0.25}
Solve the problem.A college student earned $5400 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 
and the rest at 
If the student received a total of $400 in interest at the end of the year, how much was invested at 
A. $2700 B. $2200 C. $771 D. $3200