Concept explainers
a .
To write: composite function that gives the oldest sibling’s age in terms of the youngest.
a .

Answer to Problem 67E
Explanation of Solution
Given:
The oldest is twice the age of the middle sibling, and the middle sibling is six years older than one-half the age of the youngest.
Calculation:
Let O represents the age of the oldest sibling, M represents the age of the middle sibling and Y represents the youngest sibling.
Now the oldest is twice the age of the middle sibling,
And the middle sibling is six years older than one-half the age of the youngest.
Thus,
b.
To find: Age of the middle and the younger sibling, given that the older sibling is 16 years old.
b.

Answer to Problem 67E
Middle sibling is 8 years old and the younger sibling is 4 years old
Explanation of Solution
Calculation:
From part (a),
And
So, Middle sibling is 8 years old and the younger sibling is 4 years old.
Chapter 1 Solutions
EBK PRECALCULUS W/LIMITS
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