Question

The unit cost of pens is the same regardless of how many pens are purchased. If the cost of P pens is D dollars, what is the cost, in dollars, of X pens?
A) XD
B) XPD
C) XD/P
D) XP/D
E) PD/X

What are they looking for?
I tried 1 pen is for 2 dollars but I didn't get it.
If X is the number of pens I buy, then X=PD right?

Can some please do it my way with 1 pen for 2 dollars.

If X = 5 then D of X = 10 in that case doesn't A&C work?

A) 5*2=10
C) (5*2) /1=10

WHY does that happen?

Answer 1

pretty shure the answeres A

Answer 2

why are you "pretty shure the answeres A" ? can you explain it to me please?

Answer 3

well ur just trying to find the price of the pens which is D and u have X pens so u multiply them together

Answer 4

what about P? what happened to that?

Answer 5

P was irevent thing to throw u off

Answer 6

Look I know that the right answer is C but I don't understand how I can get there.

Answer 7

The right answer is C. To get the price for one pen you divide D by P. Than you can multiply by the number of pens you are buying. That's XD/P.

Answer 8

awesome! can you do that with numbers and explain it like real life? because I understand that but when I do it with numbers I get a big mess.

Answer 9

You gots to imagine it like this
P Pens is equal to any number of pens, like 25 pens come in one box
D Dollars is the cost of a 25 penbox if you purchased a whole box.
then X pens is to say you wanted an odd number of these pens.

The solution seems to be to figure out he cost of one pen then multiply that by X ( Which is the number of pens the customer wants).
So in some way you divide D by P, then multiply by X, and this is shown BACKWARD in choice C

Answer 10

I get it now thanks!

Answer 11

YAY! Oh ya, Multiply and Divide are reversable in the order of operations lol and give same answer