Answer:
Step-by-step explanation:
I have attached a picture to make you understand better.
The first step is to state the system of equations that represent this situation.
Let x and y be the cost of a hand towel and a bath towel respectively.
The equation that represents the money spent for the towels of the hotel in Washington is:
The equation that represents the money spent for the towels of the hotel in Lancaster is:
Solve the given system of equations by equalization:
It means that a hand towel costs $4.
Use this value to find y:
A bath towel costs $11.
Answer: 400
Step-by-step explanation:
I'm not sure 400
Answer:
Step-by-step explanation:
Given
See attachment for complete question
First, we calculate the water pipe length (AC):
The cost of laying across water is twice (2 times) laying on land.
So, the total cost (C) is:
Differentiate
To find the most economical cost, we simply minimize C' by equating C' to 0
Cross multiply
Take square of both sides
Collect like terms
Solve for
Solve for x
Rationalize: