Posted by **Haydee** on Saturday, August 19, 2006 at 11:42pm.

I am confused need help

a computer store sold a total of 300 items last month. the store sold six times as many hard drives as they did CD-RoM drives, and half as many floppy drives as hard drives. Based on this information,, how many of each item were sold?

Let X = number of hd.

Y = number of cd

Z = number of fl/d.

=======================

You know:

X + Y + Z = 300

The problem tells you that the store sold six times as many hard drives as cd Rom so you know 6Y = X.

The problem tells you that the store sold 1/2 as many floppy drives as hard drives; therefore, 1/2 X = Z

===============================

Using X + Y + Z= 300, just substitute the value of Y in terms of X (from above which is Y= 1/6 X) and the value of Z in terms of X and solve for X.

I hope this helps. We shall be happy to check your work if you post it.

I really dont understand, i am new at this and have 4 anwser to it dont know which one because dont know how to get to the answer and they are:

1.30hd,90fl/d and 180 cd

2.40",20" and 240 "

3.180hd,90fl, and 30cd

4, 240hd, 20fl,and 40cd

My problem is how to get this anwser, could u explain to me how ge to the anwer of course knowing the anwer, i will understand.

If the store sold 1 cd / 6x as many hd = 6 / half as many floppy = 3 / 1 + 6 + 3 = 10.

They are sold in ratios of 10.

divide 10 into 300 etc etc dose this help.

mike

thanks i still dont get it but i am working on it. ok thanks again.

Obviously you have interpreted four different ways and three of those ways are not right. Do what I suggested and post your work so we can give you some guidance as to where you are going wrong. I have given you the three equations you need to solve the problem; the remainder is just arithmetic. I don't want to work the problem for you. I want you to understand how to do the problem.

Finding the area of a rectangle with 5 as one side and x+3 on the other.

Hey i said i love math no go screw a duck!

- math -
**Gabrielle**, Tuesday, April 22, 2008 at 10:27pm
A computer store sold a total of 300 items last month. The store sold six times as many hard drives as they did CD-ROM drives, and half as many floppy drives as hard drives. Based on this information, how many of each items were sold?

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