Write the complex number in rectangular form using exact values if possible. Otherwise, round to one decimal place.5(cos 150° + i sin 150°)
A. 1.9 - 1.1i
B. 2.5 - 4.3i
C. -4.3 + 2.5i
D. -1.9 + 1.1i
Answer: C
Mathematics
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Solve the equation by first clearing the fractions.- 
r + 2r = 
r + 
A. {0}
B. {18}
C. 
D. 
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Solve the problem.If the shaded figure is a gnomon to the white rectangle, then x =
A. 12. B. 6. C. 18. D. 8. E. none of these
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Simplify.(4x2 - xy - y2) + (x2 + 9xy + 11y2)
A. 5x2 + 8xy + 10y2 B. 3x2 - 10xy - 12y2 C. 5x2 + 10xy + 12y2 D. 4x2 + 9xy + 11y2
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors. log7
A. 
log7p + 
log7q - log718
B. 
log7p + 
log7q - 
log718
C. 
log7p ? 
log7q ÷ 
log718
D. 
log7pq - 
log718
Mathematics