Solve the problem.If f(x) = 
and g(x) = 
, find (fg)(x).
A. 
B. 
C. 
D. 
Answer: C
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Solve the system, using Cramer's rule, if possible. 8x - y - 2z = -2-2x + 6y - 2z = 16 2x - 4y + z = -11
A. ? B. {(1, 3, 4)} C. {(-1, 4, 2)} D. {(1, 4, 3)}
Simplify. Assume that variables can represent any real number.
A. 27k2 B. 3k9 C. -3k2 D. 3k2
Solve the problem.To estimate the ideal minimum weight of a woman in pounds multiply her height in inches by 4 and subtract 130. Let W = the ideal minimum weight and h = height. Express W as a linear function of h.
A. W(h) = 130h + 4 B. W(h) = 4h - 130 C. W(h) = 4 (h + 130) D. W(h) = 130
The percentage 
of children who are able to speak in at least single words by the age of t months can be approximated by the equation.
?
?
By what age are 80% of children speaking in at least single words? Round your answer to the nearest month.
?
A. 10
B. 6
C. 7
D. 15
E. 4