math = evil

[JT]

Yep.

I'm doing this graded exam for homework and it's on monomials and multiplying them. I pretty much understand it, but I have one question.

IF ANYONE UNDERSTAND WHAT I AM TALKING ABOUT, PLEASE HELP!!!

OK so the problem is

(7t)(-s(exp2)t)(2s(exp3))

the exp means that the number is an exponent.

Now I understand most of it, but I'm not sure if I have to multiply 7 and 2 (the one with the s behind it), because 7 has a T and 2 has an S. What do I do!?

[Rhiannon]

i hate math

[*MIBabe03*]

Well I don't know the answer, but you are right. Math is pure evil. It's sad but in the real world we will never need Algebra.

[PZelda]

From what I remember, you have to multiply the innermost ()'s first...lemme figure that out...

(7t)(-s^2t)(8s)

Ummm...if I did this right, I got -8s²7t as my answer...

You have to move the s to the front and the t has to be behind it...because it goes in ABC order. Yeah, I'm no math expert, but I remember doing this when I was in HS and it was pretty easy for me...but I graduated 2 years ago. :p

I probably totally did that wrong...:o

[MonarC]

I totally suck at math. :rolleyes:

[Chambers]

You can multiply anything with different variables. You just can't add them and turn them into a monomial.


If I read it correctly, I think the answer is -14t(^2)s(^6).
Anybody get the same thing?

[Caffeine King]

:p I asked my sister, she's in Algebra...

She said it was...

-7texp(3)s + 14texp(2)s

[Sterling Holobyte]

Originally posted by JT
Yep.

I'm doing this graded exam for homework and it's on monomials and multiplying them. I pretty much understand it, but I have one question.

IF ANYONE UNDERSTAND WHAT I AM TALKING ABOUT, PLEASE HELP!!!

OK so the problem is

(7t)(-s(exp2)t)(2s(exp3))

the exp means that the number is an exponent.

Now I understand most of it, but I'm not sure if I have to multiply 7 and 2 (the one with the s behind it), because 7 has a T and 2 has an S. What do I do!?
:bonk:Oy! Call me if you get to a 2+2 type question.

[nmnf920]

would this be it?

(7t)(-s²t)(2s³)

anyway, i haven't done this type of algebra since 8th grade but as far as i remember you would multiply the 7 and 2, which would come out as 14ts³. you'd include the variables (t and s) and the variable exponents (2 and 3) since they're unknown, and are supposed to be multiplied by the known (7 and 2, which is 14).

so, (7t)(2s³) = 14ts³. i tested it and it's true.

[Chambers]

Originally posted by Caffeine King
:p I asked my sister, she's in Algebra...

She said it was...

-7texp(3)s + 14texp(2)s

That's impossible. He's doing monomials (meaning it's one term with one nonzero number and no + or - signs).

[Chambers]

Originally posted by safety pin
would this be it?

(7t)(-s²t)(2s³)

anyway, i haven't done this type of algebra since 8th grade but as far as i remember you would multiply the 7 and 2, which would come out as 14ts³. you'd include the variables (t and s) and the variable exponents (2 and 3) since they're unknown, and are supposed to be multiplied by the known (7 and 2).

so, (7t)(2s³) = 14ts³. i tested it and it's true.

Oh, good you got the exponents in. But since you're multiplying two t's, you'd get t squared. And since s is negative, the answer would be negative as well. And s would be to the power of six, since you'd have to multiply their exponents (2 times 3). Right? I haven't done this since high school...so I may be off.

But as for math being evil, I disagree. It could be pretty fun. Especially if you had good teachers.

[nmnf920]

Originally posted by Chambers
Oh, good you got the exponents in. But since you're multiplying two t's, you'd get t squared. And since s is negative, the answer would be negative as well. And s would be to the power of six, since you'd have to multiply their exponents (2 times 3). Right? I haven't done this since high school...so I may be off.
I didn't include the (-s²t), i just multiplied (7t) and (2s³) since he was asking if you multiply the 7 and 2 being that they have different variables.

[Chambers]

Originally posted by safety pin
I didn't include the (-s²t), i just multiplied (7t) and (2s³) since he was asking if you multiply the 7 and 2 being that they have different variables.

Oh, got it.

[nmnf920]

ok, i solved the whole thing..

14t²(s5)

5 being the exponent. i'm certain it's correct.

[Chambers]

Originally posted by safety pin
ok, i solved the whole thing..

14t²(s5)

5 being the exponent. i'm certain it's correct.

Ooh that's right. You add exponents when multiplying.

[JT]

Originally posted by safety pin
ok, i solved the whole thing..

14t²(s5)

5 being the exponent. i'm certain it's correct.

OMG! A few minutes ago, I just did it without stopping and that is what I got!! Thanks, dahling!

Honestly, I don't know why I'm panicking over this. The grading peiod just started and I can afford one F. I as able to afford two of them last time and got a 3.2 B...

[AllIWantIsYourClutch]

I actually like math this year. Go figure.

-14s^5t^2

[Caffeine King]

:eek: I'm gonna have Algebra next year and this isn't looking too easy...:(

[Warm & Fuzzy]

Originally posted by JT
OMG! A few minutes ago, I just did it without stopping and that is what I got!! Thanks, dahling!

Honestly, I don't know why I'm panicking over this. The grading peiod just started and I can afford one F. I as able to afford two of them last time and got a 3.2 B... Hate to break it to yah, Jae Tee, but that's incorrect. The right answer would have to be a negative, (given -s²t)... hence it's -14s^5t². I'm positive. :) AllIWantIsYourClutch is right, too.

[nmnf920]

hold on..:grr:

[Warm & Fuzzy]

.

[Brent88]

:eek2:

Can someone honestly tell me what good this crap will do you in your everyday adult life? :rolleyes:

[nmnf920]

Originally posted by Transit Whiz
Hate to break it to yah, Jae Tee, but that's incorrect. The right answer would have to be a negative, (given -s²t)... hence it's -14s^5t². I'm positive. :) AllIWantIsYourClutch is right, too.
I tested that out, it didn't work. :grr: to figure out problems like this i subsitute variables with numbers to see if it would work. here's what i calculated, 6 and 7 are random numbers i chose.

t=6
s=7

(7t)(-s²t)(2s³) = 8470728

-14[7^5]6² = -8470728

that's using the same variables for both, so because of making the 14 negative, the answer came out different than the answer to the original form, but only by the negative sign.

14t²s^5 = 8470728.

hope i didn't confuse too many people with my weird problem solving strategies :grr:

[nmnf920]

Originally posted by Brent88
:eek2:

Can someone honestly tell me what good this crap will do you in your everyday adult life? :rolleyes:
it's good for us geeks who do math for fun. i hate math class/homework but i love making calculations like how far away the moon was a million years ago and what percentage of random posts takes up the total number of posts on this board (last i checked it was 49%) and i use types of math i've learned up to recent years. but no, i can't say it will help me much with my singing career.

[nmnf920]

Originally posted by Transit Whiz
.
oy! :grr:

[Warm & Fuzzy]

Originally posted by safety pin
I tested that out, it didn't work. :grr: to figure out problems like this i subsitute variables with numbers to see if it would work. here's what i calculated, 6 and 7 are random numbers i chose.

t=6
s=7

(7t)(-s²t)(2s³) = 8470728

-14[7^5]6² = -8470728

that's using the same variables for both, so because of making the 14 negative, the answer came out different than the answer to the original form, but only by the negative sign.

14t²s^5 = 8470728.

hope i didn't confuse too many people with my weird problem solving strategies :grr: You did the substitutions wrong.
-s² evaluates to -49, not +49.
-s² can be re-written as (-1)(s²). It is NOT the same as (-s)².

To illustrate:

[Dutabi84]

Just to add further confusion...

[Warm & Fuzzy]

Originally posted by Dutabi84
Just to add further confusion... Yay! It was right. :D

[nmnf920]

Originally posted by Transit Whiz
You did the substitutions wrong.
-s² evaluates to -49, not +49.
-s² can be re-written as (-1)(s²). It is NOT the same as (-s)².

To illustrate:

[nmnf920]

Originally posted by Dutabi84
Just to add further confusion...
WHAT SITE IS THAT ON FROM?!!?

does it do geometry by any chance?

[Dutabi84]

Originally posted by safety pin
WHAT SITE IS THAT ON FROM?!!?

does it do geometry by any chance?

This (http://www.math.com/students/tools.html) comes in handy when you don't have a scientific calculator...or if you're just too lazy to figure stuff out by hand (me).

There's a "circle calculator" in the Geometry section, and other formulae...

homepage: http://www.math.com/index.aspx

[Warm & Fuzzy]

Originally posted by safety pin
Hey, I'm just trying to explain something to you!! Don't "whatever" me. :nonono:

:p

[vtunie]

(7t)(-s(exp2)t)(2s(exp3))

7 t . -s^2 . t . 2 s^3

-14t^2.s^5

ie t squared s to the fifth.

Is that the answer everyone else got?

[catlover79]

Math IS evil - I've said that all along!! :mad:

[Furienna]

Man, I'm fine with math until there's a parenthesis or more than one letter thrown into it. I may be a nerd, but I'm not a maths nerd. Or maybe I haven't had good enough teachers to make me understand how it works? It sounds interesting to be able to calculate how far away the moon was at a certain time, but I don't think I'll ever be able to do it.http://img152.imageshack.us/img152/8572/giveupka7.gif

[Courtnee]

If it were a physics problem, I could be of assistance, but sadly, it's not.