Explain why this sentence does not need a comma before the coordinating conjunction. he had already guzzled a gallon of water but wanted more after his long workout

Can anyone plz with this question i accidentally posted on physics it's 99 points plus this 5 ponts and will mark as brainliest link :

Give two details about the social and economic climate of the 1930s. were these details noted in to kill a mockingbird

Why would the author show scout behaving like a lady lady during aunt alexandra's circle, even though she hates doing so? select all that apply. (to kill a mockingbird) to show her acceptance of that role in life to demonstrate empathy for aunt alexandra to reflect on scout's emotional confusion to show scout's growth and maturity