Linear Algebra (for the smart ones)?
Tanx - 2Siny = 2 eq 1 Tanx - Siny + Cosz = 2 eq 2 Siny - Cosz= -1 eq 3 multiply negative 1 to eq 3 -siny+cos z=1 substitute this to eq 2 tanx +1 =2 tan x=1 x=Tan^ -1 (1)=45 degrees 1-2Siny=2 -2Siny=1 Siny=-1/2 y=Sin^-1 (-1/2)=330 degrees -1/2-cOs z=-1 Cos z=1/2 z=Cos^-1 (1/2)=60degrees
If your a 7th grader and you have pre-algebra are you smart or dumb??
It depends on your other courses and how you do in them. Pre algebra in 7 grade is normal. I'm not dumb and math was one of my weaknesses. I wasn't in pre-algebra till eigth grade! But I did well in it and got A's in most of my other classes. Got a B in russian, which proves I am not dumb! Russian is really hard when your learning about double negetives and pronouns ect. But no, your not stupid.
Really hard and long algerbra equation please? :)?
Im in grade nine and am studying for exams. The majority of the exam is algerbra equations, ex: -5(3x+4x)+2(9x-3x)=27. (not exact, just to give you the idea.) I'm ready for a HUGE step up. Would anybody know a really long equation that would take 5-10 minutes to solve. Links are great too. Thank you so much :)
Would AP Physics be hard without algebra2 and trig?
I'm about to be a junior in high school. I signed up for normal physics at first, but then my cp chem teacher told me that it would be too easy for me. My only problem is that im taking algebra 2 this year as well, and people are telling me that you need to have taken that class and trig to take ap physics. my school let me into it and everything, but im just worried that its gonna be hard for me since my only math background is algebra 1 and geometry. some advice would be appreciated :)
Am i not not smart enough to become an astrophysicist?
So i just got a 70 on my algebra quiz, first one of the year. (i am a freshman in high school) And i was recommend to math lab, which is a lab in which they help you with your math...(for people struggling in math) and i was wondering if i should be worried? And should i take this "math lab" or does it look bad on a college application? Am i good enough to become an astrophysicist?
Algebra 1 word problem help!!!! URGENT! 10 points to right answer!?
a) $10.45 (that's what paypal charges, not the entire cost in total --- I'll assume you are smart enough to get the total cost.) To find the percent of something, use is over of. is/of = %/100, meaning you have to cross-multiply. for this problem, you will use the equation: x/350 = 2.9/100 2.9*350/100 = x 1015/100 = 10.15 Then you add the extra 30 cents wich brings you to the ANSWER----> 10.45$ b) It's hard to understand the second question, because it is worded weirdly. I think you are saying they get 10% of the difference reimbursed... but you could be saying the difference + 10% of the difference... You should really make it clearer. I think it's $2.20 Same thing, you use is/of equation. first, you subtract 98 from 120, because that would be your difference. 120-98 = 22 x/22 = 10/100 10*22/100 = x 220/100 = 2.2 = $2.20 If you are saying you get back the difference PLUS 10% of the difference, your answer would be $24.20.