Solve. Express any nonreal complex numbers with i notation.x4 - 19x2 + 48 = 0
A. x = 4, 
B. x = ± 4, ± i
C. x = ± 4, ±
D. x = 16, 3
Answer: C
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Find the system of equations to model the problem. DO NOT SOLVE THIS SYSTEM.In producing three types of bricks: face bricks, common bricks, and refractory bricks, a factory incurs labor, material, and utility costs. To produce one pallet of face bricks, the labor, material, and utility costs are $50, $75, and $35, respectively. To produce one pallet of common bricks, the labor, material, and utility costs are $50, $60, and $30, respectively, while the corresponding costs for refractory bricks are $75, $100, and $45. In a certain month the company has allocated $12,000 for labor costs, $14,500 for material costs and $6,000 for utility costs. How many pallets of each type of brick should be produced in that month to exactly utilize these allocations? Set up a system of linear equations,
letting x, y, and z be the number of pallets of face, common, and refractory bricks, respectively, that must be produced in that month. What will be an ideal response?
Perform the indicated operation. Assume that all variables are nonnegative.
? 
A. 250
B. 250
C. 10
D. 10
Determine whether the following number is prime or composite. If composite, write the prime factorization.89
A. composite, 44 ? 89 B. prime C. composite, 45 ? 2 D. composite, 89 ? 1
Place the correct symbol, < or >, between the two numbers: 35, 24
A) 41>19 B) 41<19