Solve the equation in the complex number system.16x2 + 1 = 5x
A. {- 
- 
i, - 
+ 
i}
B. {- 
- 
i, 
+ 
i}
C. {
- 
i, 
+ 
i}
D. {
- 
i, - 
+ 
i}
Answer: C
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Perform the indicated operations. If possible, reduce the answer to its lowest terms.
÷ 
A. 
B. 1
C. 
D. 1
State if the vectors a and b are perpendicular, parallel, or neither. If a and b are parallel, state whether they point in the same direction or in opposite directions.a = 
, b = 
A. Perpendicular B. Parallel, opposite directions C. Parallel, same direction D. Neither
Solve the problem.A parallelogram has a base of length x + 7 and a height of x + 2 and has an area of 50 square units. Find the base and height of the parallelogram. (A = bh)
A. height = 2 units; base = 25 units B. height = 6.25 units; base = 8 units C. height = 1 unit; base = 50 units D. height = 5 units; base = 10 units
Solve the problem.In the following formula, f(x) is the minimum number of hours of studying required to attain a test score of x: 
How many hours of study are needed to score 96?
A. 21.45 hr B. 99.96 hr C. 11.09 hr D. 110.90 hr