Factor completely.5x2 + 5x - 60
A. 5(x + 3)(x - 4)
B. 5(x - 3)(x + 4)
C. (5x + 15)(x - 4)
D. (x - 3)(5x + 20)
Answer: B
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Find all specified roots.Square roots of i
A. -i, i
B. -1, 1
C. 
- 
i, - 
+ 
i
D. 
+ 
i, - 
- 
i
Solve the problem.Suppose the following matrix represents the input-output matrix, T, of a simplified economy. Manufacturing Agriculture Transportation 
The demand matrix is D = 
Find the amount of each commodity that should be produced.
A. 2240 units of manufacturing, 1864 units of agriculture, and 2008 units of transportation. B. 2008 units of manufacturing, 1864 units of agriculture, and 1984 units of transportation. C. 1984 units of manufacturing, 2257.6 units of agriculture, and 1860.8 units of transportation. D. 2008 units of manufacturing, 2240 units of agriculture, and 1860.8 units of transportation.
Multiply and simplify.-6z ? 
A. 0 B. 36z C. 1 D. -1
Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exist.
