First of all, you want the variable to be isolated, so in order to do that, you divide in both sides. Ten divided by two is five. So f = 5.
2f + 10
--- ---
2 2
10 divided by 2 = 5
Answer: The answer is -3 1/2 - 1/5
so it's C.
Step-by-step explanation:
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 
Answer:
1.) -90, -69, -49, 85
2.) -23, -17, -1, 69
3.) -93, -78, -16, 61
Step-by-step explanation: