Brown, Harvard,Y,Columbia,Cornell,USC,Carnegie Mellon
GPA: 6.87/6.0 weighted (my school is weird)
SAT: 1460 (800 math, 660 r+w)
SAT II: Math II 750, Math I 770, Physics 650
Rank: 5/850
AP Classes: Physics I, Physics C, Calculus BC, Econ, Govt, Literature,Bio, Chemistry, French 4
The rest are honors classes
President of Key Club (member 10-12)
Secretary of NHS
SAT tutor
Senior Ballerina for non profit ballet company
officer for school literary magazine
Attended LEAD Summer Business Institute
National hispanic scholar
first generation american
first generation college student
female
hispanic
texas
national hispanic scholar, ap scholar, honor roll, UPENN business plan competition
over 400 hours in community service
get sat above 1500 or act above 33 for good chances
I would say you have a strong chance at some of those schools especially being a first generation college student with your ECs. You would probably be waitlisted or rejected at Harvard and Columbia simply due to your SAT scores but everything else looks really strong! Best of luck! chance me back?
I think your SAT score leaves you at the brink of vulnerability. However, depending on your essays and recommendations, a lot of benefits can be brought. Your background, involvements, and sense of community responsibility definitely make you desirable and fitting for these universities, although you must ensure these take the center stage on your application. I would also suggest retesting if possible! And that GPA does look weird 
Now according to me,
Brown - Accept/Waitlist
Harvard - Reject/Waitlist
Yale - Reject
Columbia - Waitlist/Reject
Cornell - Accept/Waitlist
USC - Accept
Carnegie Mellon - SCS (Reject) and College of Engineering (Waitlist)
Best of Luck! 
Also, chance me back?
http://talk.qa.collegeconfidential.com/what-my-chances/1970884-predict-my-results-will-chance-back.html#latest