The percentage of 18-to-25-year-old smokers in the United States has been declining at a constant rate since 1974. If about 47% of this group smoked in 1974 and about 29% smoked in 1994, find a linear equation that models this decline. If this trend continues, what percentage will smoke in 2006.
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Please enter your answer as a number without the units. Round to the nearest tenth, if necessary.
Fill in the blank(s) with the appropriate word(s).
18.2
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Decide whether or not the given equation is an identity. = sec ?
A. Yes B. No
Subtract. Simplify, if possible. -
A.
B.
C.
D.
Provide an appropriate response.Is it possible to have a polynomial function whose only zeros are 7 and i? If so, write such a function. If not, explain why.
A. Yes; P(x) = x2 - (7 + i)x + 7i is such a function. B. No; the conjugate zeros theorem requires that -7 and -i must also be zeros. C. No; the conjugate zeros theorem requires that -i must also be a zero. D. Yes; P(x) = x2 - (7 - i)x - 7i is such a function.
Use the discriminant to determine the number and type of solutions for the given equation.x2 - 8x + 7 = 0
A. one (repeated) real rational solution B. two real rational solutions C. two imaginary solutions D. two real irrational solutions