Find an equation of the line with the given slope that passes through the given point. Write the equation in the form 
m = - 
; (5, 5)
A. 4x - 7y = 55
B. 4x + 7y = 55
C. 7x + 4y = -55
D. 4x + 7y = -55
Answer: B
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Determine whether the circle with the given equation is symmetric to either axis or to the origin.2x2 + 2y2 + 8y - 73 = 0
A. Symmetric to both axes B. Symmetric to y-axis C. Symmetric to x-axis D. Symmetric to neither axis nor origin
Solve the problem.Find an equation for the level surface of the function f(x, y, z) = 
d? - 
dt that passes through the point (0, ln 9, ln 3) .
A. ey + ez - 
= -6
B. ey + ez - 
= 6
C. ey - ez + 
= 6
D. ey - ez + 
= -6
10x2 + 23x + 12 = 0
A. - 
, - 
B. 
, 
C. 
, - 
D. - 
, - 
Solve the problem.The charcoal from a tree killed in a volcanic eruption contained 64.4% of the 
found in living matter. How old is the tree, to the nearest year? Use 
for the half-life of 
A. 2508 years B. 5700 years C. 3619 years D. 1739 years