Prove that please?

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1 Answer
Feb 28, 2018

Since you're given a>5b and b>2c, it would be useful to multiply b>2c by 5 so that both inequalities contain the term 5b. If you do these, then you get a new inequality:

b>2c becomes 5b>10c when you multiply it by 5.

You can now join up the two inequalities to give a>5b>10c. Through this, you can therefore prove that a>10c.