Help with Math

That's such an awful way to go around

What an absolute waste of time

Just take Calculus 1 and learn what you need as you advance

>>8225617
https://usamo.files.wordpress.com/2016/07/napkin-2016-0718.pdf

Evan Chen is bae.

>>8225622
why?

>>8225624
looks good ill have a look at it, thanks

also can i add someone of you guys on skype or email as mentor to help me when i get to something that i dont understand after the 3rd reading?

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>>8225640

>>8225646
sadly yes i have 6 weeks free currently and i spent the first 2 weeks in azeroth and overwatch. I need get better in math and i did nothing so far because ive always been lazy

>>8225640
I would... but posting my Skype/email on 4chan probably isn't the smartest idea.

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>>8225649
I'll test you and tell you how much math you need to learn

Can you solve this?

>>8225646
also i said after 3rd reading because my english is not the best i meant when i realy get stuck and cant solve it within a few days so i do not have to annoy this board with foolish stuff

>>8225658
4
4
9

>>8225657
how about i create a trashmail address you mail me your adress to the trashmail address. We delete the email after that from the trashmail account as soon as i get it. Or maybe some other ideas?

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>>8225668

>>8225670
That maybe is pathetic but im sorry i dont know how to solve fractions without calculator

>>8225674
Protip: you need a common denominator for addition

Protip2: multiplication is freakingly easy: just multiplicate 8*1 and 3*4

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>>8225676

>>8225670

22/15 ?

8/12

>>8225674
Napkin might be a bit much for you, then. Read the AoPS Problem Solving Books.

>>8225689
yeah, notice the 8/12 can be divided by 4

so you get 2/3, which is the same but simpler

>>8225690
is it a free public available ebook/pdf or do i have to buy it?

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>>8225694
Just go to Khan Academy friendo

also solve this

>>8225692

how about devision and substraction?

-----

lets see how far i can get this night

>>8225699
nobody does manual division, use the calculator

>>8225698
2x-8=4 |+8
2x=12 |:2
x=6

2x+4=3x-1 |-4
2x=3x-5 |-3x
-x=-5 |*(-1)
x=5

>>8225698
khanacademy.org ?

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>>8225710
that's pretty good

>>8225718
yeah.

>>8225729
i have no clue what or how i should do here

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>>8225733

>>8225733
https://www.khanacademy.org/math/algebra-home/algebra/algebra-functions

I would say you should start there

>>8225741

x2+2x-8=x-1 |+8
x2+2x=x+7 |-x
x2+x=7
---------- have no idea until here

also what happens when i solve it? I mean what is the solution for? It helps me if i can imagine what im doing but i only see this graph and 2 equasions here

While i wait for some help/explanation ill make an account >>8225748

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>>8225756
the graph and the equations are unrelated, they are two entirely different problems

in the second problem what you are doing is looking for the intersection of two functions

the first function (f) is a quadratic function (the shape is that of an arch)
the second function (g) is a linear function (it's a line)

you reached x2+x=7

now you do x2+x-7=0 and apply a famous formula that looks hard as fuck but eventually gets ingrained into your brain

x2 means that a=1 because there's an invisible 1 multiplying the x2
+x means that b=1 because there's an invisible 1 multiplying the x
-7 means that c=-7

so you plug it into picture related and get two values

>>8225764
holy fuck thanks for www.khanacademy.org you can start from the very basics and videos are available in my mother language and its for free THX man <3

>>8225764
is it the pq formular? i think i heard of it

>>8225770
yeah

>>8225774
i think ill spent the night learning on khanacademy so i do not have to annoy you or make you work :)

Are you also registered? can i add you somehow?

>>8225774
also good night, enjoy khan academy

>>8225777
i never registered, i just watched the youtube videos

good night all and thanks for the help :)

Does anyone who uses the academy want to show me how to add people and give me his profile?

nearly 100% in the very basics :)

>>8225658
>>8225668

how come 2+2=2*2

>>8225729
i know im late, but I wanna do this shit.
f(x) = x^2 +2x - 8
g(x) = x - 1

f(x) = g(x)
x^2 + 2x - 8 = x - 1
x^2 + x - 7 = 0

x = (-b +- sqrt(b^2 - 4ac))/2a
x = (-1 +- sqrt (1 + 28))/ 2
x = (-1 +- 5.38)/2

x = 2.19
x' = -3.19

tell me if i made a mistake somewere

>>8226035
because a+a = 2a
just like a+a+a = 3a

>>8226064

>standard form
>apply quadratic formula

Correct

(I didn't check numbers)

>>8225617
put electroes on your skin, moist by salt and play 16bit encoded wiki maths thru your muscles

>>8225674
I am really sorry then,you dont seem like you have a chance

>>8226372
Hurray, i have some kind of memory