Ten runners join a race.In how many possible ways can they be arranged as first,second,and third placers?
1 answer:
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Answer:
= b
or
7 = b
(they are the same value, just different ways of writing it)
Step-by-step explanation:
4 = - (5) + b
simplify
4 = - + b
now use inverse operations
4 = - + b
+ +
= b
