Brenda B.

asked • 11/13/21

Linear word problem

A computer costs $1250 per unit and hard drives cost $104 per unit. The revenue from x computers and y hard drives can be represented by what expression?


Mark M.

Is the hard drive part of the computer or an add-on?
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11/13/21

Colleen S.

Hi Brenda! Sometimes it's easier to think of these problems if we use number examples. Let's just say that we sold 2 computers and 3 hard drives. Then we know that our total revenue will be 2 * 1250 from the computers and 3 * 104 for the hard drives. Then we would add these amounts together to find the total revenue: 2 * 1250 + 3 * 104. Now that we have seen it with a concrete example, we can find an expression for the total revenue of x computers and y hard drives. We still want to multiply x by 1250 and y by 104, then add the results together. Our expression for the revenue is 1250x + 104y.
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11/13/21

Mark M.

That is if the two items are solde separately. That is not stated in the problem.
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11/14/21

Joel L.

tutor
I understand what you are saying Mark. computers have hard drives also inside them. But it doesn't mean that the cost of a "computer" without a hard drive is $1250-$104 = $1146. You are forgetting the labor cost. Also I put " " on the "computer" because a computer without a hard drive is not a 100% computer unit. So computer is a computer, hard drive is a drive. For sure these are sold separately it doesn't have to state that in the problem. Besides, this is just algebra 1. I don't think that is as complicated as what you are saying.
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11/14/21

Brenda B.

Thank you Colleen you explained it so simply. I appreciate your help
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11/14/21

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