Question

Stacey's text messaging plan costs $7 for the first 550 messages and 30¢ for each additional text message. If she owes$39.40 for text messaging in the month of May, how many text messages did she send that month?

Answer 1

658 text messages

Step-by-step explanation:

. Since you already know that for 7$ she gets 550 text messages, we can remove the 7$ from the 39.40$ she spent for the month, which leaves 39.40 - 7 = 32.40$

. Now since we know that for each extra 30 cents she gets to send one addition text,

=> we need to figure out first how many cents there is in the amount of money left she had to pay 32.40 * 100 = 3240 cents { since 1 $ = 100 cents }

=> then we need to figure out how many text does 3,240 cents represent, since 1 text is equivalent to 30 cent it means that in 3,240 / 30 = 108 texts messages is the amount of text she got to send with 32.40$

So in total she sent 550 + 108 = 658 texts messages for 39.40$