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for spring cleanups, a landscaper charges a flat fee of \\$60 plus \\$2…

Question

for spring cleanups, a landscaper charges a flat fee of \\$60 plus \\$20 for each hour of labor. which equation models the cost in dollars, \\(c\\), for a cleanup that requires \\(h\\) hours of labor?

\\(c = \frac{h}{20} + 60\\)

\\(c = \frac{20}{h} + 60\\)

\\(c = 20h + 60\\)

\\(c = 20 + 60h\\)

Explanation:

Response

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"quality": "clear",
"question_count": 1,
"skills_matched": [
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"concepts_used": [
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"Slope-Intercept Form"
],
"new_concepts": [],
"current_concepts": [
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"Rate of Change",
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}
</pre_analysis>

<reasoning>

Identify the rate of change and initial value

\[

$$\begin{aligned} &\text{Rate of change (cost per hour of labor)} = 20\\ &\text{Initial value (flat fee)} = 60 \end{aligned}$$

\]

Formulate the linear equation

\[
c = 20h + 60
\]
</reasoning>

<answer>
<mcq-option>(A) \(c = \frac{h}{20} + 60\)</mcq-option>
<mcq-option>(B) \(c = \frac{20}{h} + 60\)</mcq-option>
<mcq-correct>(C) \(c = 20h + 60\)</mcq-correct>
<mcq-option>(D) \(c = 20 + 60h\)</mcq-option>
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Multiple Choice",
"knowledge_point": [
"Mathematics",
"Algebra",
"Linear Equations"
]
}
</post_analysis>

Answer:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"multiple_choice_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Linear Equations",
"Slope-Intercept Form"
],
"new_concepts": [],
"current_concepts": [
"Linear Equations",
"Slope-Intercept Form",
"Rate of Change",
"Initial Value"
]
}
</pre_analysis>

<reasoning>

Identify the rate of change and initial value

\[

$$\begin{aligned} &\text{Rate of change (cost per hour of labor)} = 20\\ &\text{Initial value (flat fee)} = 60 \end{aligned}$$

\]

Formulate the linear equation

\[
c = 20h + 60
\]
</reasoning>

<answer>
<mcq-option>(A) \(c = \frac{h}{20} + 60\)</mcq-option>
<mcq-option>(B) \(c = \frac{20}{h} + 60\)</mcq-option>
<mcq-correct>(C) \(c = 20h + 60\)</mcq-correct>
<mcq-option>(D) \(c = 20 + 60h\)</mcq-option>
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Multiple Choice",
"knowledge_point": [
"Mathematics",
"Algebra",
"Linear Equations"
]
}
</post_analysis>