Question

The cost of a cell phone bill (C) increases when the number of text messages (T) increases. Write the correct equation for this scenario, and solve for the cost when the number of texts is 4.

Answer 1

`c = (2)/(5) t`, if the number of texts is 4, then the cost is $1.60.

Explanation:

If 2 texts costs $5, then each text costs $
`(2)/(5)`.

So, we can setup the equation to
`c = (2)/(5) t`.

If the number of texts is 4, we can substitute that into our equation.

`c = (2)/(5) \cdot 4`

`c = (8)/(5)`

`c = 1.60`

Hope this helped!