| Posted By |
Message |
| Pages: [1] 2 |
|
|
OK - I'm no Kelly Pickler, Anyone up for another ???.... SCROLL to bottom
Someone please explain this to me - I am studying to take this exam and this was one of the practice questions....
Together, a pen and pencil cost $2.59.
The pen cost $1.79 more than the pencil.
What was the cost of the pencil?
......So they give you only formulas in the multiple choice.
The correct formula is the following:
2.59 = X + (X+ 1.79)
But why? I don't understand.....
Can someone please help me????
Message edited 12/4/2007 1:51:54 PM.
|
Posted 12/4/07 11:11 AM  |
| |
|
Long Island Weddings
Long Island's Largest Bridal Resource |
CathyB
Member since 5/05 19403 total posts
Name:
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
The pencil costs X
The pen is $1.79 more than the pencil, so X+$1.79
So pencil + (pen) = 2.59
or X+(x+1.79)=2.59
|
| Posted 12/4/07 11:13 AM |
| |
|
HappyWife
LIF Toddler
Member since 12/06 484 total posts
Name:
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
Posted by lipglossjunky73
Someone please explain this to me - I am studying to take this exam and this was one of the practice questions....
Together, a pen and pencil cost $2.59.
The pen cost $1.79 more than the pencil.
What was the cost of the pencil?
......So they give you only formulas in the multiple choice.
The correct formula is the following:
2.59 = X + (X+ 1.79)
But why? I don't understand.....
Can someone please help me????
The pencil is X because you know the pen costs 1.79 more than the pencil. Therefore, the pen is x (the pencil) plus 1.79. And you know the total price is 2.59 so think of it as the pencil + the pen (pencil + 1.79) = 2.59.
I think I got that right?!? 
|
| Posted 12/4/07 11:13 AM |
| |
|
nylisa
My Children
Member since 5/05 7905 total posts
Name:
MaMa
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
2.59 = X + (X+ 1.79) is the answer because:
2.59 is the total of the two items = the X represents the price of the pencil + (the x represents the price of the pencil added to the 1.79 equals the price of the pen). Since it said more than the pencil, it means that you have to add 1.79 to the price of the pencil to get the price of the pen.
|
| Posted 12/4/07 11:14 AM |
| |
|
JMC1014
We got a puppy!!
Member since 5/07 1420 total posts
Name:
J
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
X is going to equal the cost of the pencil so the formula would read:
The total cost ($2.59)= the pencil cost (X) + the pen cost (which is the pencil cost(X) + $1.79)
I hope that makes sense!!
|
| Posted 12/4/07 11:15 AM |
| |
|
Kara
Now Zagat Rated!
Member since 3/07 13217 total posts
Name:
They call me "Tater Salad"
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
The pen costs $1.79 more than the pencil. You don't know what the pencil costs, so you call the pencil x.
Then pen costs pencil + $1.79 or x = $1.79.
So, pencil = X
pen = x + $1.79
Together, the pen and pencil = $2.59
$2.59 = pencil + pen
Plug in your values for pen and pencil and you get
$2.59 = x + (x + $1.79)
Make sense?
|
| Posted 12/4/07 11:15 AM |
| |
|
|
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
Thank you ladies - I am going to really try and grasp this - I have a learning issue with math... but seeing it written out like this will help me grasp it, I hope 
|
| Posted 12/4/07 11:16 AM |
| |
|
Christine
2nd verse same as the 1st
Member since 5/05 15287 total posts
Name:
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
I stink at explaining things but X represents the cost of the pencil. You know the pen cost 1.79 more then the pencil (X) and that the two items cost 2.59.
cost of pencil (X)
plus
cost of pen (X+1.79)
equals
2.59
I don't know if that helps.
|
| Posted 12/4/07 11:16 AM |
| |
|
nylisa
My Children
Member since 5/05 7905 total posts
Name:
MaMa
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
Posted by lipglossjunky73
Thank you ladies - I am going to really try and grasp this - I have a learning issue with math... but seeing it written out like this will help me grasp it, I hope
If you need any more help, just FM me with questions. I am very good in math especially this kind. I used to tutor math.
|
| Posted 12/4/07 11:18 AM |
| |
|
|
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
Posted by Christine
I stink at explaining things but X represents the cost of the pencil. You know the pen cost 1.79 more then the pencil (X) and that the two items cost 2.59.
cost of pencil (X)
plus
cost of pen (X+1.79)
equals
2.59
I don't know if that helps.
Yes - perfect!!! 
|
| Posted 12/4/07 11:18 AM |
| |
|
Kara
Now Zagat Rated!
Member since 3/07 13217 total posts
Name:
They call me "Tater Salad"
|
Re: OK - I'm no Kelly Pickler, but I need help with this math problem!!!!
Posted by lipglossjunky73
Thank you ladies - I am going to really try and grasp this - I have a learning issue with math... but seeing it written out like this will help me grasp it, I hope
Take it a step at a time. If numbers aren't your thing, you should write it out in words first like I tried to do and then "plug in" the x and number values.
So write out:
Pencil = X (b/c it's an unknown)
Pen = Pencil + $1.79
Pen = X + $1.79
$2.49 = Pencil + Pen
$2.49 = X + Pen
$2.49 = X + (X + $1.79)
If it helps you to know where the parentheses go, put every "item" in its own set. Since Pencil is just x (and not a formula), it doesn't need parentheses, though you could put them in if you wanted to.
|
| Posted 12/4/07 11:20 AM |
| |
|
|
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Matt earned the following in 6 weekly tests:
91
89
82
95
86
79
He was hoping to earn an average of 90 which would have him get an A-
How many more total percentage points should Matt have earned over the course of 6 weeks to qualify for the A-?
I want to see if you guys get it before I give you the answer....
|
| Posted 12/4/07 11:21 AM |
| |
|
tourist
Member since 5/05 10425 total posts
Name:
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
I thoguht 3, but now I think 18
Message edited 12/4/2007 11:25:31 AM.
|
| Posted 12/4/07 11:23 AM |
| |
|
nylisa
My Children
Member since 5/05 7905 total posts
Name:
MaMa
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by tourist
3, I think.
That is what I think too but I coulde be wrong.
|
| Posted 12/4/07 11:24 AM |
| |
|
tourist
Member since 5/05 10425 total posts
Name:
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by nylisa
Posted by tourist
3, I think.
That is what I think too but I coulde be wrong.
I think I changed my mind!
|
| Posted 12/4/07 11:25 AM |
| |
|
|
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by nylisa
Posted by tourist
3, I think.
That is what I think too but I coulde be wrong.
Thats the answer I chose, but I was wrong - its 18!!!!
WHY??????
|
| Posted 12/4/07 11:25 AM |
| |
|
JMC1014
We got a puppy!!
Member since 5/07 1420 total posts
Name:
J
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by lipglossjunky73
Matt earned the following in 6 weekly tests:
91
89
82
95
86
79
He was hoping to earn an average of 90 which would have him get an A-
How many more total percentage points should Matt have earned over the course of 6 weeks to qualify for the A-?
I want to see if you guys get it before I give you the answer....
18 more percentage points because to get a 90 average he would had to have gotten a total test score of 540 and 540/6=90 average.
|
| Posted 12/4/07 11:26 AM |
| |
|
nylisa
My Children
Member since 5/05 7905 total posts
Name:
MaMa
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by lipglossjunky73
Posted by nylisa
Posted by tourist
3, I think.
That is what I think too but I coulde be wrong.
Thats the answer I chose, but I was wrong - its 18!!!!
WHY??????
Because the 3 points times by the total amount of tests he took (6) is 18.
|
| Posted 12/4/07 11:26 AM |
| |
|
Gertyrae
Peace out Homies!
Member since 5/05 20046 total posts
Name:
Gerty ®
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
18?
|
| Posted 12/4/07 11:26 AM |
| |
|
Maathy317
Grammie's Little Man
Member since 2/06 3235 total posts
Name:
D
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
O.K. I am a complete and total dumba$$ when it comes to math, but, I never understood why this needs to be so complicated. If a pen and a pencil cost $2.59 and the pen is $1.79, why can't you just subtract the cost of the pen from the total cost? Wouldn't that be easier? I know that's not how they teach math anymore, but, it just makes more sense to me. No matter how you figure it out, the cost of the pencil is still going to be $.80 so you can get the total of $2.59. Guess I'm just "old school" and showing my age. Unless I'm just completely missing something which would just prove why I am a complete and total dumba$$ in math.
|
| Posted 12/4/07 11:27 AM |
| |
|
tourist
Member since 5/05 10425 total posts
Name:
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by lipglossjunky73
Posted by nylisa
Posted by tourist
3, I think.
That is what I think too but I coulde be wrong.
Thats the answer I chose, but I was wrong - its 18!!!!
WHY??????
Ok, I got 18 the 2nd time.
if you add up his scores & divided by 6, to get an average, it is 87, which is 3 points away from 90.
But in order to have an average of 3 more percetage points overr the course of 6 weeks, he would have had to have gotten 3 per week (or equivalent) so, you multiply 3 x 6.
Message edited 12/4/2007 11:28:57 AM.
|
| Posted 12/4/07 11:28 AM |
| |
|
nylisa
My Children
Member since 5/05 7905 total posts
Name:
MaMa
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by Gertyrae
18?
Yes because he would of needed 3 more points to have a 90 average so in order for him to get that you have to times the 3 by how many tests he had taken (6).
|
| Posted 12/4/07 11:28 AM |
| |
|
JMC1014
We got a puppy!!
Member since 5/07 1420 total posts
Name:
J
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by Maathy317
O.K. I am a complete and total dumba$$ when it comes to math, but, I never understood why this needs to be so complicated. If a pen and a pencil cost $2.59 and the pen is $1.79, why can't you just subtract the cost of the pen from the total cost? Wouldn't that be easier? I know that's not how they teach math anymore, but, it just makes more sense to me. No matter how you figure it out, the cost of the pencil is still going to be $.80 so you can get the total of $2.59. Guess I'm just "old school" and showing my age. Unless I'm just completely missing something which would just prove why I am a complete and total dumba$$ in math.
The cost of pen is $1.79 more then the cost of the pencil so it is really the cost of the pencil + an additional $1.79.
|
| Posted 12/4/07 11:29 AM |
| |
|
|
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by nylisa
Posted by Gertyrae
18?
Yes because he would of needed 3 more points to have a 90 average so in order for him to get that you have to times the 3 by how many tests he had taken (6).
OOOOOOOOOOOOOOOOOOOOOOOOOOHHHHHHHHHHhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!
I actually GET that!!!!!!
He needed 3 more points tagged onto each exam!!!!!!!!!!
Message edited 12/4/2007 11:29:35 AM.
|
| Posted 12/4/07 11:29 AM |
| |
|
nylisa
My Children
Member since 5/05 7905 total posts
Name:
MaMa
|
Re: OK - I'm no Kelly Pickler, but I need help with ANOTHER math problem!!!! SCROLL to bottom...
Posted by lipglossjunky73
Posted by nylisa
Posted by Gertyrae
18?
Yes because he would of needed 3 more points to have a 90 average so in order for him to get that you have to times the 3 by how many tests he had taken (6).
OOOOOOOOOOOOOOOOOOOOOOOOOOHHHHHHHHHHhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!
I actually GET that!!!!!!
He needed 3 more points tagged onto each exam!!!!!!!!!!
Exactly.
|
| Posted 12/4/07 11:29 AM |
| |
|
| Pages: [1] 2 |
