Math homework help

[Shane]

I know these questions might be really easy for some of you but I need help with these questions. Im in a Math Prep class and this is stuff from like 11th grade but i forgot it all bc I suck at math.......

Numbers 40-60 EVEN numbers (40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60)

[blown00]

Re: Math homework help

First one I came up with

0= -21b^2 + 91b

Just use quad formula to solve. I dont feel like doing it without my calculator here.

[airattack111]

Re: Math homework help

First one I came up with

0= -21b^2 + 91b

Just use quad formula to solve. I dont feel like doing it without my calculator here.

Most modern day computers have calculators on them:slap:

[98Camaro3.8]

Re: Math homework help

Haven't done any serious math in years, but I'll give them a shot...

40: 7. This one changed since you posted the picture.
42: -2
44: b = anything?
46: Again, seems to be equal to anything
48: This one is impossible
50: Any number
52: Any number
54: c = 2.5(b-2)
56: t = 2(5-3v)

[Everglades W68]

Re: Math homework help

[kala]

Re: Math homework help

Ouch!.

I am too sleepy to do them now, but when i wake up i'll do them. Btw, make sure that your teacher is not watching online. I remember seeing someone at ls1tech almost got expelled from college.


:)

[Shirl]

Re: Math homework help

You're going to give me nightmares with that CRAP!! :slap:
Do you know what I did with my MATH BOOK when I finally passed the class my senior year of college????



I set it on fire and BURNED IT to ashes.

[stevethepirate]

Re: Math homework help

You're going to give me nightmares with that CRAP!! :slap:
Do you know what I did with my MATH BOOK when I finally passed the class my senior year of college????



I set it on fire and BURNED IT to ashes.

haha!!!

i walked home, my mom had mine sitting on the table so i could sell it back ($120 text book)... i took it, threw it on the grill, it set on fire. she was like "WTF!!!" so i picked it off, and threw it into the pool. she was like "WTF???", so i fished it out, and threw it onto the roof. true story. i hated that thing with a passion.

[WishIHad$$$]

Re: Math homework help

40) b = 7
42) m = -2
44) b = all real numbers
46) p = all real numbers
48) no solution
50) d = all real numbers
52) w = all real numbers
54) [(5/2)*b]-5
56) t = 10-6v

[blown00]

Re: Math homework help

Most modern day computers have calculators on them:slap:

No **** dumbass.

Quadratic Formula:

[-b +/- (b^2 -4(a)(c))^1/2]
________________________
2a^2 (< I think)


Yeah. Do that on calculator. I didn't feel like writing it out since I was leaving. :slap:

[blown00]

Re: Math homework help

And yes, the 1st problem changed from they way I read it.

[stevethepirate]

Re: Math homework help

quadratic is just /2(a)


x=-b+-(radical)(b^2-4(a)(c)
(all over)(2a)


if that makes sense. i sing it to the tune of pop goes the weasel.

[Camaro Dom]

Re: Math homework help

wtf? quadratic formula? no. it's all the distributive property. i only read till like 46 but thats what they all look like to me.

a(b+c)=ab+ac or w/ numbers...
#40:
-1/3(4-b)=1/7b
-1/3*4+1/3*b=1/7b (multiply 1/3 by both 4 AND b, note that the sign changed for the b on the left side of the ='s sign)
-4/3+1/3b=1/7b (multiply 4 and -1/3)
-4/3=1/7b - 1/3b (reverse the sign to move the *b* values to the other side of the ='s sign)
combine the b values: -4/3 = 3/21b-7/21b=-4/21b
so we have -4/3=-4/21b
remember how we reversed the sign to move the b values across? thats because we were supposed to subtract, so we added to the other side. now, we're supposed to multiply the b by -4/21, so to get it that to the other side, we'll divide (which means we'll flip the fraction over... think of it this way, if you gotta move an addition to the other side, subtract from both sides. here, we need to move a multiplication to the other side, so we'll divide from both sides) so...
-4/3=-4/21b
-4/3*-21/4 = (-4/21)*b*(-21/4) (note that on the right side of the ='s sign, -21/4 * -4/21 = 1, so they cancel each other out, leaving you with b)
now we have: (-4/3)*(-21/4)=b
or 84/12 = b 84/12=7 so,
b=7

rinse, wash, repeat for the rest of 'em. i suggest writing that sequence down on a piece of paper b/c it looks really complicated when its done out on teh computer like this. it's much simpler if you can look at it on paper.

[Camaro Dom]

Re: Math homework help

and all you guys talkin about the quadratic formula, take high school math again. the quadratic formula is only used on polynomials of the form x^2*a+xb+c. i didnt see anything like that in there. dont confuse the kid!

[StrtRacer98]

Re: Math homework help

wtf? quadratic formula? no. it's all the distributive property. i only read till like 46 but thats what they all look like to me.

a(b+c)=ab+ac or w/ numbers...
#40:
-1/3(4-b)=1/7b
-1/3*4+1/3*b=1/7b (multiply 1/3 by both 4 AND b, note that the sign changed for the b on the left side of the ='s sign)
-4/3+1/3b=1/7b (multiply 4 and -1/3)
-4/3=1/7b - 1/3b (reverse the sign to move the *b* values to the other side of the ='s sign)
combine the b values: -4/3 = 3/21b-7/21b=-4/21b
so we have -4/3=-4/21b
remember how we reversed the sign to move the b values across? thats because we were supposed to subtract, so we added to the other side. now, we're supposed to multiply the b by -4/21, so to get it that to the other side, we'll divide (which means we'll flip the fraction over... think of it this way, if you gotta move an addition to the other side, subtract from both sides. here, we need to move a multiplication to the other side, so we'll divide from both sides) so...
-4/3=-4/21b
-4/3*-21/4 = (-4/21)*b*(-21/4) (note that on the right side of the ='s sign, -21/4 * -4/21 = 1, so they cancel each other out, leaving you with b)
now we have: (-4/3)*(-21/4)=b
or 84/12 = b 84/12=7 so,
b=7

rinse, wash, repeat for the rest of 'em. i suggest writing that sequence down on a piece of paper b/c it looks really complicated when its done out on teh computer like this. it's much simpler if you can look at it on paper.

OMG! my eyes hurt LOL