Concept explainers
a.
To find:The list of given information and what is needed to find.
a.
Answer to Problem 20E
The list of the given information what is to be find are-
- Total gasoline available.
- Rate of usage of gasoline per hour.
- Total usage of gasoline before refuelling.
- Hours needed to stop to refuel.
Explanation of Solution
Given information:
A family trip began with 60 gallons of gasoline in fuel tank. The car used 3 gallons of gasoline per hour. The car will stop to refuel when there is exactly 1 gallons of gasoline remaining.
Calculation:
The list of the given information what is to be find are-
- Total gasoline available.
- Rate of usage of gasoline per hour.
- Total usage of gasoline before refuelling.
- Hours needed to stop to refuel.
b.
To find:
The equation based on the model.
b.
Answer to Problem 20E
The equation is
Explanation of Solution
Given information:
A family trip began with 60 gallons of gasoline in fuel tank. The car used 3 gallons of gasoline per hour. The car will stop to refuel when there is exactly 1 gallons of gasoline remaining.
Calculation:
The equation is-
Where
c.
To find:The hours need to stop to refuel and justify by using the table.
c.
Answer to Problem 20E
To find the number of hours needed to refuel, find the value of h is
Explanation of Solution
Given information:
A family trip began with 60 gallons of gasoline in fuel tank. The car used 3 gallons of gasoline per hour. The car will stop to refuel when there is exactly 1 gallons of gasoline remaining.
Calculation:
To find the number of hours needed to refuel, find the value of
Therefore,
To justify the answer a table is to be made as follows.
1 | 3 |
2 | 6 |
3 | 9 |
4 | 12 |
5 | 15 |
Chapter 3 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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