please help me with these two

Mathematics
Tutor: None Selected Time limit: 1 Day

Mar 2nd, 2015

answer of 7 is option b)

answer of 8 (-2,5)    please best me please......thanks

Mar 2nd, 2015

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Mar 2nd, 2015
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Mar 2nd, 2015
Dec 7th, 2016
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