Find all the critical numbers of the function.f(x) = 
A. -9
B. 36, 0
C. None
D. 9
Answer: C
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Use the prime factorization method to find the LCM of the variable expressions.5a and 10a2
A. 10a2 B. 5a2 C. 25a3 D. 5a3
Identify the vertex of the parabola.f(x) = -6(x + 8)2 - 7
A. (8, -7) B. (-48, -7) C. (-8, 7) D. (-8, -7)
The price of computers has been dropping steadily for the past ten years. If a desktop PC cost $6,400 ten years ago, and the same computing power cost $1,800 three years ago, find the rate of decrease per year. (Assume a straight-line model). Round your answer to the nearest cent. ?
A. $667.34 per year B. $328.54 per year C. $219.38 per year D. $657.14 per year E. $686.14 per year
Add or subtract as indicated and write the result in standard form.8i + (-6 - i)
A. -6 + 9i B. 6 - 7i C. 6 - 9i D. -6 + 7i