Here's the question you clicked on:
selenab
The lengths of the sides of a triangle form three consecutive odd numbers. The perimeter is 21 centimeters. What is the length of the longest side?
i had 7 and they said it was wrong.
well, all this question is asking is "what consecutive odd numbers add up to 21? and what is the largest digit?"
for instance, 3+5+7 does not equal 21, therefore it can't be 7 7+9+11 does not equal 21, so it can't be 11 however, there is a sequence of odd numbers that includes 7, that equals 21.