Find all values for which at least one denominator is equal to 0. Write answers using the symbol ?. Do not solve.
= 
A. x ? -9, 
B. x ? 0, -9, 
, - 
, 
C. x ? -9, 
, - 
, 
D. x ? - 
, 
Answer: A
Mathematics
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?xk; [-5, 2]
A. 
dx
B. 
dx
C. 
dx
D. 
dx
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A. Invalid B. Valid
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A. (x + 3)(x - 2) B. (x + 1)(x - 5) C. (x + 2)(x - 3) D. prime
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The decay rate of iodine-131 is 8.6% per day. What is its half-life?
What will be an ideal response?
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