Question

Your cell phone plan costs $39.99 per month plus $0.11 for each text message you send or receive. You have at most $45 to spend on your cell phone bill. What is the maximum number of text messages that you can send or receive next month? The maximum number of text messages is nothing.

Answer 1

The maximum number of text messages is 372.8

Explanation:

Given that the monthly cost is $39.99

and also $0.11 for each text (sent or recieved)

let y be the total cost

let x be the number of text

the model for the total cost is given as

y=3.99+0.11x

given that y=45

45=3.99+0.11x

45-3.99=0.11x

41.01=0.11x

divide both sides by 0.11

x=41.01/0.11

x=372.8