Concept explainers
(a)
To write: a direct variation equation
(a)
Answer to Problem 3CYU
The equation is:
Explanation of Solution
Given:
if the weight of 8-ounce is attached then spring starches by 2 inches.
Calculation:
Step 1: The weight is denoted as x and amount of stretch is y
Now, if there is direct variation then there is some constant variable k such that it satisfies the equation:
So, put the value of
Divide the equation by 8.
Step 2: use k to write an equation.
Conclusion:
Therefore, the equation is:
(b)
To estimate:the stretch of the spring if it has 20-ounce weight attached.
(b)
Answer to Problem 3CYU
The stretch value is
Explanation of Solution
Calculation:
Now, on order to calculate the length of stretched spring when weight is 20-ounce put the value of
Conclusion:
Therefore, the stretch value is
Chapter 8 Solutions
Pre-Algebra, Student Edition
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