Question

What is the length of a phone call that would cost the same no matter what company is used?

Company A - 0.35cents plus 0.3cents per minute
Company B - 0.45cents plus 0.2cents per minute

Answer 1

company A- 0.35cents plus 0.3cents per minute.

Answer 2

Answer: The length of phone call is 1 minute that would cost the same for both the companies.

Explanation:

Since we have given that

Company A - 0.35cents plus 0.3cents per minute

Company B - 0.45cents plus 0.2cents per minute

Let the number of minute be x.

So, our equation for company A would be

`0.35+0.3x`

our equation for company B would be

`0.45+0.2x`

According to question, length of phone call that would cost the same.

so, our equation becomes

`0.35+0.3x=0.45+0.2x\\\\0.3x-0.2x=0.45-0.35\\\\0.1x=0.10\\\\x=(0.10)/(0.1)\\\\x=1`

Hence, the length of phone call is 1 minute that would cost the same for both the companies.