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25-09-2015
Mathematics

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What is the sum of r+s, when r = –14.1 and s = 18.3?
a. –32.4
b. –4.2
c. 4.2
d. 32.4

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Аноним Аноним

25-09-2015

[tex]Subtitute\ the\ values\ of\ r=-14.1\\and\ s=18.3\ to\ the\ expression\ r+s:\\\\r+s=-14.1+18.3\\---------\\use\ commutative\ property:a+b=b+a\\\----------\\\\=18.3+(-14.1)=18.3-14.1=\huge\boxed{4.2}[/tex]

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