Describe the trace of the surface given by the function below in the xy-plane.
?
x2 + y2 + z2 = 1
?
A. parabola
B. ellipse (not circle)
C. circle
D. hyperbola
E. line
Answer: B
Mathematics
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Use the table of values of f to estimate the limit.Let f(x) = 
, find 
f(x).
A. 
; limit = -0.125
B. 
; limit = 0.225
C. 
; limit = 0.025
D. 
; limit = 0.125
Mathematics
Use Gaussian elimination to solve the linear system by finding an equivalent system in triangular form.
A. (-4, 5, 4) B. (4, 5, -4) C. (4, -4, 5) D. no solution
Mathematics
Factor the trinomial completely, or state that the trinomial is prime.48x2 + 40xy - 48y2
A. 8(3x - 2y)(2x - 3y) B. 8(3x - 2y)(2x + 3y) C. 8(3x + 2y)(2x - 3y) D. 8(6x2 + 5xy - 6y2)
Mathematics
Identify and graph the polar equation.r = 3 - 4 sin ? 
A. 
limacon with inner loop
B. 
limacon with inner loop
C. 
limacon without inner loop
D. 
limacon without inner loop
Mathematics