Solve. Round your answer up to the next whole number, if necessary.The MetroCity electric company is planning to produce a new lamp. For the first year, the fixed costs for setting up production are $21,000. The variable costs for producing each lamp are $19. The revenue for each lamp is $25. Find the number of lamps that are sold at the break-even point.
A. 3500 lamps
B. 3505 lamps
C. 3501 lamps
D. 3498 lamps
Answer: A
Mathematics
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Solve the system of equations. 3x - 4y = -3 6x + 2z = - 
2y - 4z = 4
A. x = - 
, y = 
, z = 
B. x = 3, y = 3, z = 
C. x = - 
, y = 
, z = - 
D. Inconsistent
Mathematics
Solve the equation.
= 12 - x
A. ±7
B. -16, -9
C. ±
D. 9
Mathematics
Express the number in scientific notation.870,000
A. 8.7 × 105 B. 8.7 × 104 C. 8.7 × 10-4 D. 8.7 × 10-5
Mathematics
Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 0.00142857 B. 700 C. 100 D. 0.07
Mathematics