More algebra help...

[Saint Nick]

amy has 8 dollars less than maria. together they have 30. how much does each girl have?

a = amy
m = maria
t = total

a = m - 8

a + (m - 8) = 30

a = 30 - m - 8
a = 22 - m

thats what i've tried...

and this one:

jims weekly pay is 2/3s of alicias. together they earned 600 dollars per week. what is each persons weekly pay?

i don't know where to start.

 

[Kalvin00]

amy-11
maria-19

correct?

Edit:

Originally posted by: jndietz

a + (m - 8) = 30

There's the problem. A + M =30. Not what you have.

 

[dighn]

Originally posted by: jndietz
amy has 8 dollars less than maria. together they have 30. how much does each girl have?

a = amy
m = maria
t = total

a = m - 8

you went wrong after here. "together they have 30" means a + m = 30

try again

 

[hjo3]

Amy has $11, Maria has $19.

 

[Saint Nick]

Originally posted by: hjo3
Amy has $11, Maria has $19.

yes but why???

 

[everman]

obligatory 42

 

[Epic Fail]

240 and 360

 

[KLin]

Originally posted by: jndietz

Originally posted by: hjo3
Amy has $11, Maria has $19.

yes but how???

fixed. please show your work hjo3 .

 

[Epic Fail]

Originally posted by: jndietz

Originally posted by: hjo3
Amy has $11, Maria has $19.

yes but why???

because this is the answer.

 

[Saint Nick]

Originally posted by: yamadakun
240 and 360

i got 225 and 375

j = (2/3)a

j + a = 600

(2/3)a + a = 600

a = 225
j = 375

 

[hjo3]

Originally posted by: jndietz
jims weekly pay is 2/3s of alicias. together they earned 600 dollars per week. what is each persons weekly pay?

i don't know where to start.

600 = A + (0.66 * A)
J = 600 - A

 

[FeuerFrei]

a=m-8 and m+a=30
m+(m-8)=30
2m-8=30
2m=38
m=19
therefore
a=19-8
a=11

 

[jds2006]

Originally posted by: jndietz

Originally posted by: hjo3
Amy has $11, Maria has $19.

yes but why???

a = m - 8
a + m = 30

^ move the m from the first equation to the left and you'll get:

a - m = -8
a + m = 30

^ add those two equations together:
2A = 22
A = 11

^substitute A (11) into one of those equations and you'll get M (19)

 

[hjo3]

Originally posted by: KLin

Originally posted by: jndietz

Originally posted by: hjo3
Amy has $11, Maria has $19.

yes but how???

fixed. please show your work hjo3 .

Hehe, okay. I started with 15, since that's half of 30. Then I halved 8 and subtracted it from 15... that gave me Amy.

 

[Epic Fail]

Originally posted by: jndietz

Originally posted by: yamadakun
240 and 360

i got 225 and 375

j = (2/3)a

j + a = 600

(2/3)a + a = 600

a = 225
j = 375

your thread title should had been "More division help..."

 

[Saint Nick]

my girlfriend loves you guys.

 

[FeuerFrei]

Originally posted by: jndietz

jims weekly pay is 2/3s of alicias. together they earned 600 dollars per week. what is each persons weekly pay?

j=2/3a and a+j=600

a+2/3a=600
3/3a +2/3a=600
5/3a=600
a=600*3/5
a=360

therefore

j=2/3(360)
j=240

 

[Epic Fail]

Originally posted by: jndietz
my girlfriend loves you guys.

what grade is she in?

 

[Saint Nick]

thank you all. we appreciate it! i'm obviously not up on my algebra... *shrug*

 

[FeuerFrei]

Originally posted by: yamadakun

Originally posted by: jndietz
my girlfriend loves you guys.

what grade is she in?

I'm guessing 9th.