If the sandwich costs x dollars per foot and it is y inches long, what is the cost?

I think this question is about creating an equation.

MY WORK:

Let C = cost

Let x = dollar per foot

Let y = amount in inches

C = xy

Is this correct?

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- September 6th 2010, 06:50 PMfdrhs1984Find the Cost
If the sandwich costs x dollars per foot and it is y inches long, what is the cost?

I think this question is about creating an equation.

MY WORK:

Let C = cost

Let x = dollar per foot

Let y = amount in inches

C = xy

Is this correct?

- September 6th 2010, 07:07 PMundefined
- September 6th 2010, 07:28 PMfdrhs1984
In that case, can you show me the right answer?

- September 6th 2010, 08:13 PMundefined
- September 7th 2010, 05:17 AMfdrhs1984
After the units are removed, does this leave me with the equation

C = x(dollars)(y/12)? - September 7th 2010, 05:25 AMundefined
Yes and no.

If you cancel as many units as possible, then yes, that's what you get, although normally you'd put the units at the end, as in C = xy/12 dollars. If you submitted the answer C = x(dollars)(y/12) I think the teacher would see this as somewhat odd.

Removing all units just results in C = xy/12. - September 7th 2010, 05:38 AMfdrhs1984
I totally get it now. Thanks. In fact, my equation and your equation are not so different.

They both produce the total cost C.