Solve the equation.x3 + 5x2 + 4x + 20 = 0
A. {5}
B. {-2, 2, -5}
C. {-5}
D. no real solution
Answer: C
Mathematics
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Solve.An investment is worth $2571 in 1992. By 1997 it has grown to $4956. Let y be the value of the investment in the year x, where x = 0 represents 1992. Write a linear equation that relates the value of the investment, y, to the year x.
A. y = 
x + 2571
B. y = 477x + 2571
C. y = -477x + 7341
D. y = -477x + 2571
Mathematics
Solve by transforming the augmented matrix into row echelon form.
A. (0, 0) B. (1, 1) C. (0, 1) D. (1, 0)
Mathematics
Find the length of the third side of the right triangle. Where appropriate, give both an exact answer and an approximation to three decimal places. 
A. 
? 5.745
B. 
? 1.548
C. 
? 2.397
D. 
? 1.244
Mathematics
Simplify by rationalizing the denominator.
A. 
B. 
C. 
D. 
- 1
Mathematics