Factor completely.x2 - 8xy + 16y2
A. (x + 4y)2
B. (x - 4y)(x + 4y)
C. Prime
D. (x - 4y)2
Answer: D
Mathematics
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Find the derivative.y = 
A. 
cos (x3)
B. 5 cos (x3) - 5
sin (x3)
C. 6
cos (x3)
D. 5
cos (x3)
Mathematics
Determine whether S defines a function.S = {(-9, 9), (-9, 4), (-1, -2), (4, 2), (8, 4)}
A. No B. Yes
Mathematics
Use the discriminant of the equation to determine the number of x-intercepts.f(x) = x2 + 2x + 3
A. No x-intercepts B. One x-intercept C. Two x-intercepts
Mathematics
Express the statement as an equation involving the indicated variables.The volume V of a sphere is 
times ? times the cube of the radius r.
A. V = 
?r
B. V = 
?r2
C. V = 
?r3
D. V = 
? 
Mathematics