Question

Marcos purchases a top-up card for his pre-paid cell phone. His remaining balance, B, can be modeled by the equation B = 35 − 0.4 n , where n is the number of minutes he's talked since purchasing the card. How much money was on the card when he purchased it?

Answer 1

Answer:

Therefore,

$35 money was in the card  when he purchased it.

Step-by-step explanation:

Given:

Marcos purchases a top-up card for his pre-paid cell phone.

His remaining balance, B, can be modeled by the equation,

$B=35-0.4n$

Where,

n = number of minutes

To Find:

How much money was on the card when he purchased it = ?

B = ? at n = 0

Solution:

So Money on the card when he purchased it , number of minutes will be zero ,

Put n = 0 in the Equation we get,

$B=35-0.4\times 0=35$

Also it is called as B - intercept

Therefore,

$35 money was in the card  when he purchased it.