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Mathematics 15 Online
OpenStudy (anonymous):

hello please someone help

OpenStudy (anonymous):

with wat??????

OpenStudy (anonymous):

1/7 divided by 2/21 + 5/2

OpenStudy (anonymous):

\[\frac{1}{7}*\frac{21}{2}+\frac{5}{2} = \frac{3}{2}+\frac{5}{2}=\frac{8}{2}=4\]

OpenStudy (anonymous):

(dividing by 2/21 is the same as multiplying by it's reciprocal 21/2)

OpenStudy (anonymous):

k can u help me with a coupl more?

OpenStudy (anonymous):

13/6 - 5/18 times 3

OpenStudy (anonymous):

\[\frac{13}{6} - \frac{5}{6*3}*\frac{3}{1} = \frac{13}{6}-\frac{5*3}{6*3}=\frac{13}{6}-\frac{5}{6}=\frac{13-5}{6}=\frac{8}{6}=\frac{2*4}{2*3}=\frac{4}{3}\]

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