Concept explainers
a.
To find:The list of given information and what is needed to find.
a.
![Check Mark](/static/check-mark.png)
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.
![Check Mark](/static/check-mark.png)
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.
![Check Mark](/static/check-mark.png)
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: Common Core Practice Workbook
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