She would have used 1200 messages in all by the month of August.
Step-by-step explanation:
Messages allowed per month = 150
There will be 8 months starting from January to August, therefore,
Time period = 8 months
Messages in 8 months = Messages per month * Time period

She would have used 1200 messages in all by the month of August.
Keywords: Multiplication
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Where are the functions?
your question is incomplete?
The Answer Is
X = 3
Hope this Helps
The answers are 6i/13 and -6i/13. The work it attached below