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[WastedSpace]

@ryunosuke akutagawa - completing @WastedSpace 's answer, if that's okay:

According to kinetic energy's formula KE = 1/2 . m . v^2 , we can conclude that it varies with mass and speed. Speed, on the other hand, varies with dislocation and time. Dislocation depends on the referential: for instance, if the referential is the bus, there is no dislocation on the passengers' part; if the referential is the road there is dislocation. The former implies that there is no speed and therefore no kinetic energy; the latter implies that there is indeed speed and consequently kinetic energy.

Thanks! I was hoping someone would check my answer!

I HAVE A QUESTION!
TYPE OF QUESTION:( Math)
YOUR QUESTION:(how do you find the (a) of a quadratic graph?)

It's 2 am, so maybe I'm missing the obvious here, but what is (a)? Is that short for something? Does that mean something? Vertex maybe?

[Origami XD]

No in quadratic formulas it's

F(x)=ax^2+bx+c


I can't remember how to get the (a) or the (b) of the equation from the graphed version

And im sorry, if it makes you feel any better it's 3 over here, but if that makes you feel bad don't worry Im a night owl

[breadstick]

I HAVE A QUESTION!
TYPE OF QUESTION: maths
YOUR QUESTION: i have...several.
1 - how do you prove something algebraically? i have a question that says "prove algebraically that the difference between any two odd numbers is an even number"
2 - vectors. what are they? how do you describe the transformation of a shape by a vector?? idk if that makes sense; i can't make any of it either?

[Thalassic]

I HAVE A QUESTION!
TYPE OF QUESTION: maths
YOUR QUESTION: i have...several.
1 - how do you prove something algebraically? i have a question that says "prove algebraically that the difference between any two odd numbers is an even number"
2 - vectors. what are they? how do you describe the transformation of a shape by a vector?? idk if that makes sense; i can't make any of it either?

1.
I believe the proof is like.. you have to come to a conclusion where you could replace any odd number with, say, X, and your proof would still make sense. So that means instead of proving that the difference between 3 and 5 is an even number, and the difference between 5 and 13 is an even number, and so on for every 2 odd numbers, you'd just prove it all at once. Does that make sense?
//I wasn't sure if you actually need an explanation of the answer, or just what the answer is supposed to be. I studied math in a different language so let me know if this makes no sense. :'D

2.
A vector is a line, or often shown as an arrow, that has 2 properties - direction (which is why arrows work very well), and length (often shown as the coordinate where it ends).

All of these are vectors. You can see each of them has a clear direction, and you could find each of their lengths if you needed to.

[fika.]

I HAVE A QUESTION!
TYPE OF QUESTION: maths
YOUR QUESTION: i have...several.
1 - how do you prove something algebraically? i have a question that says "prove algebraically that the difference between any two odd numbers is an even number"
2 - vectors. what are they? how do you describe the transformation of a shape by a vector?? idk if that makes sense; i can't make any of it either?

ahh the first question was on my maths mock exam lol.

basically you just need to prove algebraically. i'm not exactly sure how to do it, but for our question the answer was this:

(2n+1)-(2n+3) = __

so for example plug in n

(2[6]+1)-(2[4]+3) =
(18 + 1)-(8+3)=
19-11 = 8.

n needs to be an even number to make the equation odd numbers.
does that make sense?

[aequilibrium]

@Origami XD - with the graphic of f:

If there are two zeros:


- Get the coordinates of the two
- Use a system and replace the x and y with the coordinates of the two points


If there is only one or no zeros:


- Get the coordinates of the vertex
- Use a system, knowing that the coordinates of a vertex are:
x y = - b / (2a)
x x = - (b^2 - 4ac) / (4a)

There is probably some way with way less work, but I'm not being able to remember anything, sorry xs






@breadstick - correcting @Cataclasm and @blink 182 's answers, if that's okay:

1.
To prove something algebraically, you need to generalize it to any possible numbers you can choose.

Consider an odd number m.

Whenever you multiply any integer number by 2 you get an even integer. so, considering any number k, an even number can be defined by 2k. Whenever you add 1 to an even number you get an odd number, so any odd number can be defined by 2k + 1.

So, your answer should look like this:



Considering m1 and m2 any integer odd numbers:

m1 - m2 = 2 k1 + 1 - (2 k2 + 1) = 2 k1 + 1 - 2 k2 - 1 = 2 (k1 - k2)

2 (k1 - k2) is obviously an even number so you just proved it algebraically.



2.
I don't know their actual names in english, but I learned (both in maths and physics classes) that vectors had 3 proprieties: length, direction and orientation.

If you have two horizontal vectors, but one is pointing left and one is pointing right, the two have the same direction - horizontal - but the former has an orientation from right to left and the latter has an orientation from left to right.

You could have learned it a different way, make sure you go through your books or ask your teacher before using this.

[Thalassic]

2.

I don't know their actual names in english, but I learned (both in maths and physics classes) that vectors had 3 proprieties: length, direction and orientation.

If you have two horizontal vectors, but one is pointing left and one is pointing right, the two have the same direction - horizontal - but the former has an orientation from right to left and the latter has an orientation from left to right.

You could have learned it a different way, make sure you go through your books or ask your teacher before using this.

We'd just say the two were parallel to eachother, but it wasn't really considered a whole new property, since if placed on the 0;0 point on a graph, the end points would have different coordinates and their directions were different, making them different.

[breadstick]

thank you, all of you; that cleared it up greatly for me ^^

[Waki]

Quick question: is there anyone here fluent in French?

[aequilibrium]

@Waki - I'm not, but my mom is so if you need anything feel free to ask ^-^