RELATED QUESTIONS

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  My dad crossed the united states illegally about 19 years ago. He met my mother after being here for a couple of months. She is an american citizen. He and my mother had 3 children. I am almost 18 and my brother and sister are under 18. He payed taxes and he never got in trouble with police. He went back to mexico around 6 years ago. I was wondering if he has a chance coming over to the U.S.A but legally. If he can, how can we help him.
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  My girlfriend and I were happy together had a dog lived together and talked of marriage. My friend would always come over and hang with me, after a while him coming over turned into a everyday thing. Long story short, situations happend like me and my buddy hanging in the garage and him saying goodbye and then an hr later I go upstairs and he's sleeping on the floor next to the couch we're my girlfriend is sleeping. Other things like they had exchanged phone numbers without me knowing. I asked them both if anything was goin on I felt like an idiot when they both said no. Time passed then more stuff like I pulled into the grocery mart parking lot and there sitting there talking . I ended up asking my girlfriend and my friend a ton of times if what I was feeling like they were hooking up was real No no no your insane and insecure. Ok my girlfriend ended up leaving me because of all this she told me that they never talked at all. We're broken up now and my friend still comes around but he dosnt seem like a real friend he says I would never do that, and then bragged to me the other day about how he hooked up with a chick who has a boyfriend.
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  I have a trip to Paris planned with my parents, girlfriend and her daughter (9yo). Recently we found out that my father has prostate cancer and will need to undergo radiation treatment. He wont be able to come. Should the rest of us still go? My father has my brother and sister who will be able to support him while we are gone. I am going to feel bad if we go without him but also if we don't go at all. My girlfriend, her daughter, and my mother are really looking forward to the trip and still want to go. Should we not go? My sister is giving my mom a hard time about it. The trip is in a month. Thoughts?
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  two balls A and B of masses 40g ang 50 g are moving at speed of 40m/s and 30m/s respectively. If after colliding, B starts moving with a velocity 25m/s, what is the velocity of A?