What are Opposite Operations (Inverse Operations)?
2 answers:
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A company makes baseball cards in packs of 10, boxes of 100, and cases of 1,000. A store orders a total of 15,470 cards. How can the company fill the order in the exact amount?
Answer: The company can fill the order in exact numbers as:
15 cases, 4 boxes, 7 packs
15 cases contain cards
4 boxes contain cards
7 packs contain cards
Therefore, the total cards are:
Sum of an irrational number and a rational number is always irrational. Take for example 1/2 + 
. Clearly, 1/2 is rational and its decimal expansion is equal to 0.5, while 
is irrational and has a non-repeating, non-terminating decimal expansion. When you add the two, you are obviously going to get a non-repeating, non-terminating decimal expansion, hence the sum is irrational.