Perform the indicated operation.(11a + 13c)(11a - 13c)
A. 121a2 - 286ac - 169c2
B. 121a2 - 169c2
C. 121a2 + 286ac - 169c2
D. 11a2 - 13c2
Answer: B
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Find all numbers that satisfy the following.The total profit function P(x) for a company producing x thousand units is given by 
Find the values of x for which the company makes a profit. [Hint: The company makes a profit when 
A. x is between 3 thousand units and 12 thousand units B. x is greater than 3 thousand units C. x is less than 3 thousand units or greater than 12 thousand units D. x is less than 12 thousand units
Solve the system of equations. If the system is dependent, express solutions in terms of the parameter z.-7x + 2y - 6z = 15-4x + y - 6z = 10
A. 
B. 
C. 
D. 
Use Cramer's Rule (if applicable) to solve the system of equations.
A. {(-1, 5)} B. {(0, 4)} C. {(0, 5)} D. ?
Multiply.× 
A. 348.62 B. 60.7 C. 347.52 D. 347.63