Find the domain of the function.f(x) = 9x - 9
A. {x|x ? 9}
B. all real numbers
C. {x|x ? 0}
D. {x|x > 0}
Answer: B
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Find the requested composition of functions.Given f(x) = 5x + 9 and g(x) = 4x - 1, find (f ? g)(x).
A. 20x + 14 B. 20x + 8 C. 20x + 35 D. 20x + 4
Perform the indicated operation and, if possible, simplify.
- 
A. 
B. 4
C. 
D. 
Supply missing statements and missing reasons for the following proof.Given: Chords 
and 
intersect at point N in 
Prove: 
)S1. R1.S2. Draw 
R2.S3. 
R3. The measure of an ext. 
of a 
is 
the sumof measures of the two nonadjacent int. 
. S4. 
and 
R4.S5. R5. Substitution Property of EqualityS6. R6. Substitution Property of Equality
What will be an ideal response?
For the given probability density function, over the given interval, find the mean, the variance, and the standard deviation.f(x) = 
x, [0, 2]
A. ? = 
; ?2 = 
; ? = 
B. ? = 
; ?2 = 
; ? = 
C. ? = 
; ?2 = 
; ? = 
D. ? = 
; ?2 = 
; ? = 