Solve the polynomial equation.x3 - 9x2 + x - 9 = 0
A. x = 9, -i, i
B. x = -9, -i, i
C. x = -1, 1, 9
D. x = -9, 9, i
Answer: A
Mathematics
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Solve.The average value of a certain type of automobile was $14,520 in 1991 and depreciated to $6240 in 1995. Let y be the average value of the automobile in the year x, where x = 0 represents 1991. Write a linear equation that models the value of the automobile in terms of the year x.
A. y = -2070x + 14,520
B. y = -2070x - 2040
C. y = -2070x + 6240
D. y = - 
x - 6240
Mathematics
Use a sum or difference identity to find the exact value.
A. -2
B. - 
C. - 
D. - 
Mathematics
Find an exact value.cos 75°
A. 
B. 
- 
C. -
+ 
D. 
Mathematics
Simplify the expression using the order of operations. Write the answer as an improper fraction where appropriate.
A. 49
B. 
C. 41
D. 10
Mathematics