The companies charge the same amount at 150 minutes
A linear equation is represented as:
[tex]y = mx + c[/tex]
Where:
m represents the rate
c represents the flat fee
So, the linear equations of both companies is:
[tex]y =35 + 0.15m[/tex]
[tex]y =20 + 0.25m[/tex]
Where m represents the number of minutes
Equate both functions
[tex]20 + 0.25m = 35 + 0.15m[/tex]
Collect like terms
[tex]0.25m - 0.15m =35 -20[/tex]
[tex]0.1m =15[/tex]
Solve for m
[tex]m =150[/tex]
Hence, the companies charge the same amount at 150 minutes
Read more about linear functions at:
https://brainly.com/question/15602982
