Find area of a rectangle with vertices -9,3 -9,-7 -6,-7 and -6,-3
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Because of a linear pair then because of vertical angles and because all angles have to be 180 added up
Let be the weight of i-th player.
1. If the mean weight of 4 backfield members on the football team is 221 lb, then
2. If the mean weight of the 7 other players is 202 lb, then
3. From the previous statements you have that
Add these two equalities and then divide by 11:
Answer: the mean weight of the 11-person team is