Write the system of equations associated with the augmented matrix. Do not solve.
A. 
B. 
C. 
D. 
Answer: B
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Find the domain of the composite function f?g. Write the domain in interval notation.f(x) = 8x + 56, g(x) = x + 6
A. (-?, 13) ? (13, ?) B. (-?, -7) ? (-7, -6) (-6, ?) C. (-?, -13) ? (-13, ?) D. (-?, ?)
Divide.
A. 3 + 5i B. - 3 - 5i C. 5 - 3i D. -5 + 3i
Determine two functions, designated by y1 and y2, such that their union will give the graph of the given equation.(x - 4)2 + (y + 1)2 = 16
A. (x - 4) + (y1 + 1) = 2 and (x - 4) + (y2 + 1) = -2
B. y1 = 1 + 
and y2 = 1 - 
C. y1 = -1 + 
and y2 = -1 - 
D. y1 = -1 + 
and y2 = -1 - 
Solve the problem.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). Use the equation of the least squares line to predict the growth of a plant if the temperature is 78. 
A. 31.68 mm B. 29.42 mm C. 32.31 mm D. 31.06 mm