A hair product company sells three types of hair products for $30, $20 and $10 per unit. In one year, the total revenue for the three products was $820,000 which corresponded to the sale of 42,000 units. The company sold half as many units of the $30 products as units of the $20 product. Use Cramer's Rule to solve a system of linear equations to find how many units of each product were sold.
?
A. 10,000 units at $30, 20,000 units at $20, 12,000 units at $10.
B. 10,000 units at $30, 20,000 units at $20, 18,000 units at $10.
C. 10,000 units at $30, 20,000 units at $20, 20,000 units at $10.
D. 10,000 units at $30, 20,000 units at $20, 14,000 units at $10.
E. 10,000 units at $30, 20,000 units at $20, 16,000 units at $10.
Answer: A
Mathematics
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