Question
Solving a decimal word problem using a two-step linear Inequality
For his phone service, Ali pays a monthly fee of
What are the possible numbers of minutes he has used his phone in a month?
Use
For his phone service, Ali pays a monthly fee of
What are the possible numbers of minutes he has used his phone in a month?
Use
Ask by Osborne Higgins. in the United States
Jan 23,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Ali has used at least 1,447 minutes in a month.
Solution
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Beyond the Answer
To model Ali’s phone service charges, we can set up the inequality based on the information given. His total charges can be represented as:
Subtract
Next, divide both sides by
So, the possible number of minutes Ali has used his phone in a month is
Now, let’s dive into some fun facts!
Those monthly fees and per-minute charges can trace back to important evolution in phone billing! Back in the day, cellular providers charged by the minute without any cap, which led to wild billing. Now, many plans offer unlimited use or different pricing structures to cater to different needs—making cell plans a math-savvy venture!
And speaking of being savvy! When solving inequalities, always remember to flip the inequality sign when multiplying or dividing by a negative number. It’s an easy mistake to make, but being aware can save you from reaching incorrect conclusions, especially when dealing with dollar amounts or other real-world applications where every cent counts!
