# Math / Fractions

If 3/8 + 3/4 = \$36.35 and the room to cover is 12 ftX 12 ft how much will the total cost be.

I do not want the answer, I want you to explain to me HOW to GET the answer.

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1. Are you sure this is the entire problem? It doesn't make any sense to me.

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2. Benjamin and Olivia are putting a new floor in their kitchen. To get the floor up to the
desired height, they need to add 1 ft of subfloor. They can do this in one of two ways.
They can put -in. sheet on top of -in. board (note that the total would be ft or 1 ft).
They could also put -in. board on top of -in. sheet.
The table below gives the price for each sheet of plywood from a Home Depot store
on 1/15/04.
3
4
3
8
1
8
9
8
5
8
1
2
1
8
247 2005 Thickness Cost for a 4 ft � 8 ft Sheet
in. \$9.15
in. 13.05
in. 14.99
in. 17.88
in. 19.13
in. 21.36
in. 25.23
1 in. 28.49
7
8
3
4
5
8
1
2
3
8
1
4
1
8
1. What is the combined price for a -in. sheet and a -in. sheet?
2. What is the combined price for a -in. sheet and a -in. sheet?
3. What other combination of sheets of plywood yields the needed 1 -in. thickness?
1
8
3
4
3
8
5
8
1
2
4. Of the four combinations, which is most economical?
5. The kitchen is to be 12 ft �12 ft. Find the total cost of the plywood you have suggested
in question 4.

It is number 5 that I am having trouble with.

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3. i need help with 1 through 5

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posted by gertrude

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