Concept explainers
Find the range of speeds that would give a gas mileage of atleast 25 miles per gallon.
Answer to Problem 82SR
The speed of the vehicle should be =
Explanation of Solution
Given:
The gas mileage y in miles per gallon for a certain vehicle is given by the equation
Calculation:
Given:
y is atleast 25 miles per gallon.
So,
To solve the inequality , graph the related function
Since the graph opens downwards and intersects x- axis at x = 22.087 and x = 67.913
Also, we need
The graph lies above the x- axis for the values of x :
So, the speed of the vehicle should be =
Chapter 6 Solutions
Glencoe Algebra 2 Student Edition C2014
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