Valdez Mcfarlane
05/03/2024 · High School
Use the given price-demand function to answer parts \( (A) \), (B), and (C). \( p(x)=75-2 x \quad 1 \leq x \leq 25 \)
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Step-by-step Solution
The price-demand function given is \( p(x) = 75 - 2x \), where \( p(x) \) represents the price at which \( x \) units are demanded, and \( x \) is the quantity demanded. The function is valid for \( 1 \leq x \leq 25 \).
Let's address parts (A), (B), and (C) based on this function.
### Part (A): Find the price when \( x = 10 \).
To find the price when \( x = 10 \), we substitute \( x \) into the price-demand function:
\[
p(10) = 75 - 2(10) = 75 - 20 = 55
\]
So, the price when \( x = 10 \) is **$55**.
### Part (B): Find the quantity demanded when the price is $35.
To find the quantity demanded when the price is $35, we set \( p(x) = 35 \) and solve for \( x \):
\[
35 = 75 - 2x
\]
Rearranging the equation:
\[
2x = 75 - 35
\]
\[
2x = 40
\]
\[
x = 20
\]
So, the quantity demanded when the price is $35 is **20 units**.
### Part (C): Determine the maximum price and the quantity at which it occurs.
The maximum price occurs when \( x \) is at its minimum value, which is \( x = 1 \):
\[
p(1) = 75 - 2(1) = 75 - 2 = 73
\]
Thus, the maximum price is **$73**, and it occurs when the quantity demanded is **1 unit**.
### Summary of Results:
- (A) Price when \( x = 10 \): **$55**
- (B) Quantity demanded when price is $35: **20 units**
- (C) Maximum price: **$73** at **1 unit**.
Quick Answer
- (A) Price when \( x = 10 \): **$55**
- (B) Quantity demanded when price is $35: **20 units**
- (C) Maximum price: **$73** at **1 unit**.
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