To find the information you know and the information you need. Write the inequality to find the number of text messages when the total bill per month and solve it.
Answer to Problem 44PPE
Explanation of Solution
Given:
It is known that cell phone costs per month are
The total bill at most equal to
Calculation:
It is needed to know maximum number of messages send or receive.
Let the number of messages send or receive per month be
To find the number of text messages when the total bill per month is
The plan costs plus product of the price for each message and the number of messages is equal to the total bill spend per month.
Therefore, the required inequality is as follows:
To find the number of messages send per month, solve the inequality for
Subtract each side by
The number of message is a whole number. Maximum integer value of
Therefore, the number of messages for each month can be sent or received is
Chapter 3 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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