The Official Homework Help Thread

[Blu-chu]

It helps if you sing a song.

1st Declension (to the song Twinkle, Twinkle Little Star)

A, A-E, A-E, A-M
A, A-E, A-R-U-M
I-S, A-S, I-S too
Now the first declension’s through

Second Declension (to the song Jingle Bells)

U-S I. . . O U-M
O I O-R-U. . . -M
I-S O-S I-S is the 2nd declension…masculine!

Oh my gosh, thank you so much! Haha, this is fun. xD It's really helping!

 

[KarlaKGB]

For organic, I need to memorize ALOT of mechanisms and reactions. Does anyone have any methods that work for them? I'm about to take the toughest exam of the course in a week and I can't get the hang of the reactions at all. I just have to memorize so many mechs like: formation of ethers, formation of epoxides, nucleophilic substitution and additions (?), and SN and E reactions in general. Memorizing general answers aren't helping because I always miss something (like mistaking an elimination reaction for substitution) >< Any tips would be appreciated nwn

i just drew a big ass diagram with every mechanism/reaction and how they relate to each other.
i used this website back in the day http://www.chemguide.co.uk/mechmenu.html#top

 

[Sona]

boomp

 

[Sona]

Bump!

 

[Sona]

bumpppp

 

[N e s s]

If there's anyone on here currently, how do you find the rule of translation on a graph? If its simple, can you VM me the answer?

 

[KarlaKGB]

If there's anyone on here currently, how do you find the rule of translation on a graph? If its simple, can you VM me the answer?

about graph translations:
http://www.bbc.co.uk/schools/gcsebitesize/maths/algebra/transformationhirev1.shtml

 

[Rena.]

Has anybody taken stats??
Anybody know how to do this on a ti calc? V
"Find the z-score such that the area under the standard normal curve to the left is 0.71."

it would help a ton, thanks :3

 

[Mao]

really stuck on that question. you have to work out an expression for the shaded area *i think the shaded area because the textbook says area??*

the answer is 19a?b⁴ but not sure how you can get that.
i did 4a?b x 5b^3 = 20a?b⁴

then ab? x ab? = a?b⁴

20a?b⁴ - a?b⁴ = 20a?b⁴

 

[Acruoxil]

20a?b⁴ - a?b⁴ = 20a?b⁴

That's gonna be 19a?b⁴ and not 20a?b⁴, hahah. Just a slight calculation error c:

 

[Sona]

boomp

 

[Sona]

 

[Sona]

 

[Beardo]

What's the equation to find an ordered pair from something like 2y+X=4 ?

 

[Zandy]

What's the equation to find an ordered pair from something like 2y+X=4 ?

Do you mean to ask "how do you find an ordered pair on 2y + x = 4?"

If so, then by isolating the variable y, you can get y = [4 - x]/2 and so for any number x, the point:

f(x) = (x, [4 - x]/2)

lies on the line 2y + x = 4.

Alternatively, you can isolate the point x to get x = 4 - 2y and so for any number y, the point:

f = (4 - 2y, y)

lies on the line 2y + x = 4.

Both expressions for points on the line 2y + x = 4 are the same. I hope this helps, though, if I am misunderstanding the question, could you please elaborate more ^^?

 

[JellyLu]

i just drew a big ass diagram with every mechanism/reaction and how they relate to each other.
i used this website back in the day http://www.chemguide.co.uk/mechmenu.html#top

Thanks so much! I made a huge diagram too but I'm still getting confused on writing multi-step syntheses o-o That website looks really helpful though so I'll definitely be using it so again, thanks!

 

[Llust]

disregard my question from page 34 - i already got it covered by this point so i dont need assistance anymore

 

[Sona]

 

[Sona]

boop

 

[Sona]

~~~