Write equations of the horizontal and the vertical lines that pass through the given point.(-2, -4)
A. horizontal: y = -4x + 0;
vertical: x = -2y + 0
B. horizontal: y = - 
x + 0;
vertical: - 
y = x + 0
C. horizontal: x = -2;
vertical; y = -4
D. horizontal: y = -4;
vertical: x = -2
Answer: D
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Find the domain of the rational function.r(x) = 
A. All real numbers except -6 and -8 B. All real numbers except 6 and 8 C. All real numbers except -5 and 4 D. All real numbers except 5 and -4
Solve the equation.
(10x - 20) = 
(8x - 4)
A. {1}
B. {-8}
C. {-1}
D. 
Solve the problem.Suppose f(x) = 33.1 + 1.2log (x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the depth (to the nearest tenth of a meter) where the salinity equals 35.
A. -0.9 m B. 39.3 m C. -1.0 m D. 37.3 m
Find the product and simplify.
? 
A. 3
B. 30
C. 6
D. 36