Solve the proportion.
= 
A. 16
B. 2
C. 
D. 1
Answer: D
Mathematics
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Find the derivative of the function.r = (sec ? + tan ?)-6
A. -6(sec ? + tan ?)-7(tan2 ? + sec ? tan ?)
B. -6(sec ? tan ? + sec2?)-7
C. 
D. -6(sec ? + tan ?)-7
Mathematics
Solve the equation by completing the square.x2 - 8x + 20 = 0
A. 4 ± 2i B. 6, 2 C. 8 ± 4i D. -4 ± 2i
Mathematics
The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 
A. y2 = 10x - 25 B. x2 = 10y - 25 C. y2 = 25 - 10x D. x2 = 25 - 10y
Mathematics
Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Mathematics