Concept explainers
To explain: Variations in z according to the given situation.
Answer to Problem 11OE
If x and y are both doubled, z is quadrupled.
Explanation of Solution
Given information:
The following variation:
z varies jointly as x and y.
The following situation:
x and y are both doubled.
Calculation:
The given variation can be expressed as an equation as follows:
where k is a constant.
If x and y are both doubled, the equation can be written as:
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Algebra and Trigonometry: Structure and Method, Book 2
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