Problem Analysis:
The task involves translating word phrases into algebraic expressions and interpreting a table to derive a rule for the total cost of renting a scooter. Let's solve each part step by step.
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Question 1:
Word Phrase: The quotient of a number and seven
Solution:
- The quotient means division.
- A number can be represented as \( n \).
- Dividing a number by seven is written as \( \frac{n}{7} \).
Correct Answer: D. \( \frac{n}{7} \)
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Question 2:
Word Phrase: 74 less than a number
Solution:
- "Less than" indicates subtraction.
- A number can be represented as \( n \).
- Subtracting 74 from a number is written as \( n - 74 \).
Correct Answer: A. \( n - 74 \)
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Question 3:
Word Phrase: Five times a number
Solution:
- "Five times" indicates multiplication by 5.
- A number can be represented as \( n \).
- Multiplying a number by 5 is written as \( 5n \).
Correct Answer: C. \( 5n \)
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Question 4:
Word Phrase: 4 more than twice a number \( x \)
Solution:
- "Twice a number \( x \)" means \( 2x \).
- "4 more than" indicates addition of 4.
- Adding 4 to \( 2x \) is written as \( 2x + 4 \).
Correct Answer: B. \( 2(x + 4) \)
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Question 5:
Word Phrase: The product of 9 and the sum of a number \( x \) and 2
Solution:
- "The sum of a number \( x \) and 2" is \( x + 2 \).
- "The product of 9 and" indicates multiplication by 9.
- Multiplying 9 by \( x + 2 \) is written as \( 9(x + 2) \).
Correct Answer: A. \( 9(x + 2) \)
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Question 6:
Task: The table shows how the cost of renting a scooter depends on how long it is rented. What is a rule for the total cost? Give the rule in words and as an algebraic expression.
#### Table Data:
| Hours | Cost |
|-------|------|
| 1 | $17.50 |
| 2 | $35.00 |
| 3 | $52.50 |
Solution:
1.
Identify the Pattern:
- For 1 hour, the cost is $17.50.
- For 2 hours, the cost is $35.00, which is \( 2 \times 17.50 \).
- For 3 hours, the cost is $52.50, which is \( 3 \times 17.50 \).
2.
Determine the Rule:
- The cost increases linearly with the number of hours.
- The cost per hour is $17.50.
- If \( h \) represents the number of hours, the total cost \( C \) is given by:
\[
C = 17.50 \times h
\]
3.
Express the Rule in Words:
- The total cost is $17.50 multiplied by the number of hours rented.
Final Answer:
-
In Words: The total cost is $17.50 times the number of hours rented.
-
Algebraic Expression: \( C = 17.50h \)
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Final Answers:
1. D. \( \frac{n}{7} \)
2. A. \( n - 74 \)
3. C. \( 5n \)
4. B. \( 2(x + 4) \)
5. A. \( 9(x + 2) \)
6.
In Words: The total cost is $17.50 times the number of hours rented.
Algebraic Expression: \( C = 17.50h \)
Boxed Final Answer for Question 6:
\[
\boxed{C = 17.50h}
\]
Parent Tip: Review the logic above to help your child master the concept of 10th grade algebra 2 worksheet.