Solve the equation.
+ 
= 5
A. - 
, -10
B. 
, -10
C. - 
, 10
D. 2, 10
Answer: C
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Simplify the complex fraction.
A. 
B. 
C. 
D. 
Find the vertex, focus, and directrix of the parabola. Graph the equation.(x + 3)2 = -(y + 2)
A. vertex: (-3, -2)
focus: (-3, -2.25)
directrix: y = -1.75
B. vertex: (-3, -2)
focus: (-3.25, -2)
directrix: x = -2.75
C. vertex: (3, 2)
focus: (3, 1.75)
directrix: y = 2.25
D. vertex: (3, 2)
focus: (2.75, 2)
directrix: x = 3.25
Solve the problem.A hardware store had monthly sales of $79,200 and spent 8% of it on promotions. How much was spent on promotions?
A. $990,000 B. $99,000 C. $63,360 D. $6336
?A firm can produce 100 units per week. If its total cost function is 
dollars, and its total revenue function is 
dollars, how many units x should it produce to maximize its profit?
?
A. ?1250 units B. ?650 units C. ?97 units D. ?50 units E. ?100 units