I am just guessing but you might try A
<span>Best Answer: 1) Q is positive therefore the process is endothermic. .769kj+-.810kj=-.041kj
2) Heat is released meaning it is exothermic. -66.9kj+45=-21.9kj
3) 7.29kj. Endothermic.</span>
The correct answer is x=-8
Answer is in the photo. I can only upload it to a file hosting service. link below!
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Answer:
-5a³+10a²+16a
Step-by-step explanation:
Distribute 2a first to 6a²-5a-8
7a³-12a³+10a²+16a
Add like terms.
-5a³+10a²+16a
