Deriving Formulae for mobile phone contracts
Learners given two options of mobile phone contracts. They derive formulae and substitute. Then they rearange the formula to work out how many text they can send if they make a numbe of calls on a budget.
Last updated Feb 6, 2013,
created Nov 28, 2012
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A nice activity for students to do. Thanks for uploading.
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 Created
 Nov 28, 2012
 Updated
 Feb 6, 2013
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 TESV1
This resource is available to UK teachers.
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