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 Post subject: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 6:20 am 
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English is my focal point, math literally blows.
I have the worst teachers in which English id her second language, so it makes learning even more difficult.
I would be grateful for any help. Maybe a free 20k or something if it's allowed. Show work if you can pl0x? XD

Consecutive Integer Problems
The sum of three consecutive even integers is -108. Find the numbers.

Interest
An accountant has money in three accounts that pay 9%, 10%, and 11% in annual interest. He has twice as much invested at 9% as he does at 10%. If the total interest from the three accounts is $610 for the year, how much is invested at each rate? (Hint: Let x=the amount invested at 10%)

Triangle Problems
One angle of a triangle measures 50* (degree's) more than the smallest, while a third angle is three times the smallest. Find the measure of each angle.

Miscellaneous Problems
Geometry The length and width of a rectangle are consecutive odd integers. The perimeter is 128 meters. Find the length and width.


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 Post subject: Re: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 6:49 am 
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Consecutive Integers:

a + (a-2) + (a-4) = -108
3a = -102
a = -34

Integers: -34, -36, -38

Note: I used "-2" and "-4" instead of "+2" and "+4" because I knew that the 3 integers were going to be negative.

Triangle Problem

Let "c" be the smallest side.

a + b + c = 180
a = c + 50
b = 3c

Substitute the last two equations into the first one:

c + 50 + 3c + c = 180
5c = 130
c= 26

Substitute "c = 26" into "a = c+50" and "b = 3c"

Angles: 26, 76, 78



Miscellaneous: Geometry

Sides are 31 and 33.

n + n + n + 2 + n + 2 = 128
4n = 124
n = 31


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 Post subject: Re: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 7:03 am 
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Thanks, 2 down!

Edit: 1 MOREE!! B)


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 Post subject: Re: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 7:10 am 
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But I posted 3 of them DD:

I don't wanna do the interest one because I can't figure it out LOL


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 Post subject: Re: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 7:17 am 
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PM me your Neopets username. And put something cheap for 20k!


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 Post subject: Re: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 7:40 am 
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x*.1+2x*.09+y*.11= 610

missing another equation somewhere. you need more information


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 Post subject: Re: Simple Algebra Problems =)
PostPosted: Mon Feb 08, 2010 7:47 am 
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Oh no need to give me 20k. Your +rep for me was more than enough :P I just like helping people when I can!


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