Perform the indicated operation. Write the result in the form a + bi.(2 - 4i)(2 + 6i)
A. 20 - 20i
B. 28 + 4i
C. 28 - 4i
D. -20 - 20i
Answer: B
Mathematics
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Use the graph of f to determine the intervals where f is increasing and where f is decreasing.
A. increasing: (-?, ?); decreasing: never B. increasing: never; decreasing: (-?, ?) C. increasing: [0, ?); decreasing (-?, 0] D. increasing: (-?, 0]; decreasing [0, ?)
Mathematics
Write the ratio as a fraction in lowest terms. Be sure to make all necessary conversions.8 pints to 3 cups
A. 
B. 
C. 
D. 
Mathematics
Determine the rank of the matrix.
A. 5 B. 4 C. 3 D. 2
Mathematics
Write the equation of the line in slope-intercept form.Write the equation of the line perpendicular to y = 
x + 4 that passes through the point (5, 2).
A. y = - 4x + 22
B. y = - 
x - 
C. y = - 4x - 22
D. y = 4x - 22
Mathematics