Question 622176: The sum of 3 consecutive odd integers is between 21 and 39. Which of the following inequalities exprsses the relationship if n represents the smallest integer?
21<3n+4<39
21<6n<39
21<3n+3<39
21<3n+6<39
Answer by matineesuxxx(27)   (Show Source):
You can put this solution on YOUR website! Let n represent an odd integer.
now since consecutive means, 1,2,3 and in this case we are dealing with odd numbers, so 1,3,5 we have:
n+(n+2)+(n+4) = some number
now we know this number is between 21 and 39, so we rewrite this as an inequality.
21< n+(n+2)+(n+4) <39
now simplify and we get:
21<3n+6<39
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