The table below models the cost, y, of using a high-efficiency washing machine and a standard washing machine over x number of years. Which equation represents the cost of the high-efficiency washing machine over a given number of years? Which equation represents the cost of the standard washing machine over a given number of years? After how many years of use would the washing machines cost the same amount? Which washing machine would be the more practical purchase if kept for 9 years?

2 answers
Question:

The table below models the cost, y, of using a high-efficiency washing machine and a standard washing machine over x number of years.
Which equation represents the cost of the high-efficiency washing machine over a given number of years?
Which equation represents the cost of the standard washing machine over a given number of years?
After how many years of use would the washing machines cost the same amount?
Which washing machine would be the more practical purchase if kept for 9 years?

Answers

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Answer: 1. A    y = 25x + 500Which equation represents the cost of the high-efficiency washing machine over a given number of years?   2. B     y = 30x + 400Which equation represents the cost of the standard washing machine over a given number of years?   3. D     20After how many years of use would the washing machines cost the same amount?   4. B      standard machineWhich washing machine would be the more practical purchase if kept for 9 years?  

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