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Mathematics, 28.06.2021 14:00 semawa3638
Mr Li is four times as old as his son. In five years time, the sum of their ages will be 60 years. How old are they now?
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Mathematics, 21.06.2019 18:30
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Mathematics, 21.06.2019 19:20
1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?
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Mr Li is four times as old as his son. In five years time, the sum of their ages will be 60 years. H...
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