Multiply. Write the result in the form a + bi.(9 - 3i)(2 + 4i)
A. 30 + 30i
B. 6 - 42i
C. -12i2 + 30i + 18
D. 30 - 30i
Answer: A
Mathematics
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The centroid of a triangle lies at the intersection of the triangle's medians, because it lies one-third of the way from each side towards the opposite vertex. Use this result to find the centroid of the triangle whose vertices appear as following.(0, 0), (6, 0), (3, 5)
A. (0, 
)
B. (2, 
)
C. (3, 
)
D. (3, 
)
Mathematics
Evaluate the expression.(-78)/6
A. - 
B. -23
C. -13
D. 13
Mathematics
Complete the identity.
= ?
A. tan x + tan y
B. cot 
C. tan 
D. tan 
Mathematics
Solve the problem.Let y1 equal the left side and let y2 equal the ride side of the given equation. Graph y1 and y2 and use the graph to solve the equation x - 3 = -2.
A. 
x = -1
B. 
x = 1
C. 
x = 5
D. 
x = 1
Mathematics