Therefore answer is B.
Plz answer hurry. 20 points for right answer
2 answers:
First, we need to define the function of (fog)(x)
(fog)(x) = f(g(x))
it means we need to substitute the x in the function f(x) with g(x)
f(x) = x + 7
change x with g(x)
fog(x) = g(x) + 7
fog(x) =
+ 7
equalize the denominators
fog(x) = + 7
fog(x) =
simplify
fog(x) =
fog(x) =
Second, determine the domain of the function
If the function is in fraction form, the denominator of the fraction can't be equal to zero.
x - 13 ≠ 0
x ≠ 13
The domain is {x| x≠13}
The answer is last option
(fog)(x) = f(g(x))
it means we need to substitute the x in the function f(x) with g(x)
f(x) = x + 7
change x with g(x)
fog(x) = g(x) + 7
fog(x) =
equalize the denominators
fog(x) =
fog(x) =
simplify
fog(x) =
fog(x) =
Second, determine the domain of the function
If the function is in fraction form, the denominator of the fraction can't be equal to zero.
x - 13 ≠ 0
x ≠ 13
The domain is {x| x≠13}
The answer is last option
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Answer:
Step-by-step explanation:
GIVEN: The weight, in pounds, of a newborn baby months after birth can be modeled by the function
.
TO FIND: What is the y-intercept of the function and what is its interpretation in the context of the problem.
SOLUTION:
in
if
Hence y-intercept is
the y-intercept in this represents the weight of baby just after he is born.