Im not to sure bc there isnt an age with the brother so whatever 6 plus b is
Answer:

Step-by-step explanation:
we have:
7a^2+4a+8 -5a^2 -4a -4
2a^2 +4
Answer:
k=6 and x=-11. Another way to say it is 6,11.
Step-by-step explanation:
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Answer:
<h2>
21 no sure what the "i" means</h2>
Step-by-step explanation: