Rewrite the fractions using the least common denominator.
, 
, and 
A. 
, 
, and 
B. 
, 
, and 
C. 
, 
, and 
D. 
, 
, and 
Answer: A
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Multiply or divide (as specified) the numerator and denominator by the given factor to obtain an equivalent fraction.
(divide by x + 1)
A. 
B. 
C. 
D. 
Given the values of x and y, find an equation of variation in which y varies directly as x.y = 1.5, when x = 0.4
A. y = 1.5x
B. y = 
C. y = 3.75x
D. y = 
x
Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. x + y + z = 0 x - y + 2z = -42x + y + z = -5
A. {(2, -5, 3)} B. ? C. {(-5, 3, 2)} D. {(2, 3, -5)}
Suppose that a manufacturer produces two brands of a product, brand 1 and brand 2. Suppose the demand for brand 1 is 
thousand units and the demand for brand 2 is 
/> thousand units, where p1 and p2 prices in dollars. If the joint cost function is 
, in thousands of dollars, how many of each brand should be produced to maximize profit?
?
A. 74 units of brand 182 units of brand 2
B. 9 units of brand 152 units of brand 2
C. 74 units of brand 152 units of brand 2
D. 14 units of brand 138 units of brand 2
E. 27 units of brand 177 units of brand 2