Write the expression in the standard form a + bi.(7 - 3i) + (5 + 6i)
A. -12 - 3i
B. 12 + 3i
C. 12 - 3i
D. 2 + 9i
Answer: B
Mathematics
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A. 
B. 6
C. -729
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. y = sec x, y = tan x, x = 0, x = 
A. 
B. 
C. 
D. 
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Find the matrix product when possible.
A. 
B. 
C. 
D. They cannot be multiplied.
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Solve the problem.An artifact is discovered at a certain site. If it has 78% of the carbon-14 it originally contained, what is the approximate age of the artifact to the nearest year? Carbon-14 decays at the rate of 0.0125% annually. Round to the nearest year, if necessary.
A. 863 years B. 1760 years C. 6240 years D. 1988 years
Mathematics