Nyasiabaltimore3
22.10.2019 •
Mathematics
Danielle's text messaging plan charges 5cents for each message over 600 in addition to a $13 base charge if she owes $19.70 for text messaging a month in april how many text messages did she send that month
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Ответ:
6.7/0.05=134
600+134=734
So in April she sent 734 text messages
Ответ:
Multiply the first, outside, inside, and last terms of the binomials.
Multiply a times a, a times -b, b times a, and b times -b.
This is the same as just squaring a and squaring b.
A shortcut is to add a squared and b squared.