Factor the polynomial by substitution.8x4 + 18x2 + 9
A. (4x2 - 3)(2x2 - 3)
B. (8x2 + 3)(x2 + 3)
C. (4x2 + 3)(2x2 + 3)
D. (4x2 + 1)(2x2 + 9)
Answer: C
Mathematics
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Solve the equation.log3
= x
A. 
B. 
C. 
D. 
Mathematics
Find the equation in standard form of the parabola described.The focus has coordinates (0, 19), and the equation of the directrix is y = -19.
A. y2 = 76x B. y2 = 19x C. x2 = -76y D. x2 = 76y
Mathematics
Find an equation for the ellipse described.Center at (0, 0); focus at (0, -6); vertex at (0, 7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve the problem.If the cost, C(x), for manufacturing x units of a certain product is given by 
, find the number of units manufactured at a cost of $8400.
A. 30 units B. 80 units C. 90 units D. 40 units
Mathematics