Solve the system of linear equations.
A. (2, 0)
B. (3, -1)
C. No solution
D. (-3, 0)
Answer: B
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A water source is contaminated with a toxic chemical and is being cleaned. The amount of chemical, in grams, remaining t hours after the cleaning process began is given by
?
.
?
How much of the chemical is removed from time 
to time 
?
?
A. 361.43 grams
B. 4.17 grams
C. 24.34 grams
D. 19.99 grams
Find the domain of the rational function.h(x) = 
A. {x|x ? 0, x ? -4} B. all real numbers C. {x|x ? -2, x ? 2, x ? -7} D. {x|x ? -2, x ? 2}
Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The force of gravity between two objects is the gravitational constant times the product of their masses divided by the square of the distance between them.
A. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
B. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
C. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
D. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
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.