Find (P ? Q)(x).P(x) = x + 3; Q(x) = x2 - 5x - 7
A. x3 + 8x2 + 22x + 21
B. x3 - 5x2 - 7x
C. x3 - 2x2 - 22x - 21
D. 3x3 + 15x2 - 21x
Answer: C
Mathematics
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Use the reciprocal identities to find the indicated function value.tan ? = 
, find cot ?
A. 
B. 
C. - 
D. - 
Mathematics
Divide the real numbers. Write any improper fraction as a whole or mixed number where appropriate.
A. -15
B. -25
C. 15
D. - 
Mathematics
Use the zero-product property to find all complex solutions of the equation.x3 + 6x2 + 9x + 54 = 0
A. {-3i, ±6i} B. {-3, ±6i} C. {-6i, ±3i} D. {-6, ±3i}
Mathematics
Investment A offers a 9% return compounded semiannually, and investment B offers a 8.81% return compounded continuously. Which investment has a higher rate of return over a 4-yr period?
a. Investment A. b. Investment B.
Mathematics