Solve the system of equations by substitution.x + y = -7x - y = 16
A. (7, -11.5)
B. (4.5, -11.5)
C. (7, 4.5)
D. (4.5, 11.5)
Answer: B
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Write as a percent.0.00356
A. 0.0356% B. 0.356% C. 0.178% D. 0.000356%
Solve the problem.Find the maximum and minimum values of y for the equation of simple harmonic motion: 
A. Maximum = 11, minimum = -11 B. Maximum = 14, minimum = -11 C. Maximum = 33, minimum = -33 D. Maximum = 14, minimum = -14
Solve the problem.A company that manufactures laser printers for computers has monthly fixed costs of $177,000 and variable costs of $650 per unit produced. The company sells the printers for $1,250 per unit. How many printers must be sold each month for the company to break even?
What will be an ideal response?
Use Gauss-Jordan elimination to solve the linear system and determine whether the system has a unique solution, no solution, or infinitely many solutions. If the system has infinitely many solutions, describe the solution as an ordered triple involving variable z.x + y + z= 7x - y + 2z=72x + 3z=14
A. 
B. 
C. 
D. 