Answer:
A
Step-by-step explanation:
1 feet=1/3 yards
7 feets = 7*(1/3) yards
7 feets=7/3 yards
7 feets=2 1/3 yards
We have
f(x) = 1/x+5,
g(x) = 5x+1/x -------> (5x²+1)/x
<span>
1) find the f(g(x))
</span>f(g(x))=(1/(5x²+1)/x) +5---- > (x/(5x²+1)) +5---->(x+5*(5x²+1))/(5x²+1)
(x+25x²+5)/(5x²+1)---------- > (25x²+x+5)/(5x²+1)
f(g(x))= (25x²+x+5)/(5x²+1)--------> is not x
therefore
<span>f(x) and g(x) are not inverses of each other
</span>the domain of the composition f(g(x)) is (-∞,∞)
2) find the g(f(x))
g(f(x))=(5(1/x+5,)²+1)/(1/x+5,)------- > (5/x²)+(10/x)+25+(x/(5x+1))
[5*(5x+1)+10x*(5x+1)+25x²*(5x+1)+x³]/[x²*(5x+1)]
the domain of the composition g(f(x)) is (-∞, -1/5) U (-1/5,0) U (0,∞)
Answer:
c
Step-by-step explanation:
After you take the square root, you find
... |x - 4| ≤ 3
... -3 ≤ x-4 ≤ 3
Since the coefficient of x is 1, the length of the solution space is the difference between +3 and -3, which is 6.
The length of the segment is 6.
_____
Going the rest of the way to a solution for x by adding 4 to the above inequality does not alter the difference between the high value and the low value.