q18,
stmt 1: 6=x+y
stmt 2: 130=.23x + .21y
Why is B the answer? I thought you can't solve if you have 2 variables and 1 equation
q33
q6
I just guessed that C was the answer to this, I didn't really understand stmt2
more ds from gmat prep
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q6
(1) alone is not sufficient, does not tell us anything about (u,v)
(2) try to insert number in 1:
could be u=5, r=-4 and v=5, s=-4 i.e not equidistant or
u=2, r=-1 and v=-1, r=2 i.e. equidistant
If you combine that with statement (1) you will see that all pairs are equidistant; just try a couple more numbers
(1) alone is not sufficient, does not tell us anything about (u,v)
(2) try to insert number in 1:
could be u=5, r=-4 and v=5, s=-4 i.e not equidistant or
u=2, r=-1 and v=-1, r=2 i.e. equidistant
If you combine that with statement (1) you will see that all pairs are equidistant; just try a couple more numbers
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re: q18
oh, so when I have an unequal # of variables & equations I can guess/plug in as long as I know the variables are integers?
Thats good to know.
thanks
oh, so when I have an unequal # of variables & equations I can guess/plug in as long as I know the variables are integers?
Thats good to know.
thanks
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Thank.
Can you explain this part:
how did you go from here:
1995 1000*(1+x/100)*(1+y/100)=1000*(1+x/100+y/100+xy/10000)
TO:
(2) enough so solution is 1000*(1+9.2/100)
Can you explain this part:
how did you go from here:
1995 1000*(1+x/100)*(1+y/100)=1000*(1+x/100+y/100+xy/10000)
TO:
(2) enough so solution is 1000*(1+9.2/100)
1995 1000*(1+x/100)*(1+y/100)=1000*(1+[b]x/100+y/100+xy/10000[/b]) ==> the number in the parenthesis is just multiplying out (1+x/100)*(1+y/100)
Then, you have given x+y+xy/100=9.2 ==> divide by 100 and you get
[b]x/100+y/100+xy/1000=0.092[/b] ==> replace this in the first line and you get
1000*(1+0.092)
Is this clear?
Then, you have given x+y+xy/100=9.2 ==> divide by 100 and you get
[b]x/100+y/100+xy/1000=0.092[/b] ==> replace this in the first line and you get
1000*(1+0.092)
Is this clear?
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barely.
let me ask you, if you saw this question on the test, how long will it take you
to work out this explanation? Also, did you see from stmt 2 that it might be sufficient or was it while doing the calculations, that you determined B was sufficient?
Thanks
let me ask you, if you saw this question on the test, how long will it take you
to work out this explanation? Also, did you see from stmt 2 that it might be sufficient or was it while doing the calculations, that you determined B was sufficient?
Thanks