I really need help with this problem. I have NO IDEA how to get the answers to 3 and 5.

Benjamin and Olivia are putting in a new floor in thier kitchen. To get the floor up to the desired height, they need to add 1 1/8 ft. of subfloor. They can do this in one of two ways. They can put 1/2 in. sheet on top of 5/8 in board (note that the total would be 98 ft or 1 1/8 ft). They could also put 3/8 in. board on top of 3/4 in sheet.
The table below gives the price for each sheet of plywood from a Home Depot store.

Thickness price
1/8 in. $9.15
1/4 in. $13.05
3/8 in. $14.99
1/2 in. $17.99
5/8 in. $19.13
3/4 in. $21.36
7/8 in. $25.23
1 in. $28.49

1. What is the combined price for a 1/2 in. sheet and a 5/8 in. sheet?
I got $37.01

2. What is the combined price for a 3/8 in sheet and a 3/4 in. sheet?
I got $36.35

3.What other combination of sheets of plywood yields the needed 1 1/8 -in. thickness?
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.

I have no idea how to come up with the last three answers. I don't want the answers, I just want to know HOW to work these problems. Any help would be greatly appreciated. Thanks!

First of all, check you answer for number 1 and make sure it's correct.

3. You need two sheets that equal 1 1/8 in. or 9/8 inches. So,
1 in. and 1/8 in. = 1 1/8
7/8 in. and 1/4 (or 2/8) = 9/8
3/4 (or 6/8) and 3/8 = 9/8
1/2 (or 4/8) and 5/8 = 9/8
Okay, I gave you that part. Now, for number 4. Figure out the cost for each of these, the cheapest will be the most economical. Then for 5, take this least amount and multiply it by the area of the floor (24 x 24)
Hope this helps! Good luck!

i am still confuse

ewkl tlfw vtrapfkb duetfkbn mezpy eflqxbpa qlezjum

To find the answers to questions 3, 4, and 5, you need to consider all possible combinations of plywood sheets in order to achieve a total thickness of 1 1/8 in.

Here's how you can approach it step by step:

Step 1: Convert the desired thickness of 1 1/8 in. to a fraction. As 1 inch equals 8/8, 1 1/8 will be equivalent to 9/8.

Step 2: List all the available plywood thicknesses: 1/8 in., 1/4 in., 3/8 in., 1/2 in., 5/8 in., 3/4 in., 7/8 in., 1 in.

Step 3: Start by adding the thicker sheets together, from largest to smallest, until you reach or exceed the desired thickness.

In this case, you can start with:

- 1 in. sheet + 0 in. (together, these will give you 1 in.)
- 7/8 in. sheet + 1/8 in. sheet (together, these will give you 15/8 in.)

Step 4: Continue this process for the remaining sheets until you reach the desired thickness or there are no more possible combinations.

In this case, you have:

- 3/4 in. sheet + 3/8 in. sheet (together, these will give you 11/8 in.)
- 5/8 in. sheet + 1/2 in. sheet (together, these will give you 13/8 in.)
- 1/2 in. sheet + 5/8 in. sheet (together, these will give you 13/8 in.)
- 3/8 in. sheet + 3/4 in. sheet (together, these will give you 11/8 in.)
- 1/4 in. sheet + 7/8 in. sheet (together, these will give you 15/8 in.)
- 1/8 in. sheet + 1 in. sheet (together, these will give you 9/8 in.)
- 0 in. + 1 1/8 in. sheet (together, these will give you 9/8 in.)

Step 5: Now that you have a list of all possible combinations, you can determine which combination is the most economical by comparing their prices.

Step 6: Calculate the combined price of each combination by adding the prices of the individual sheets in the combination.

Once you have found the most economical combination, you can proceed to question 5 by calculating the total cost of the plywood sheets in the suggested combination. Multiply the price of each sheet by the number of sheets used, then sum up the individual costs to get the total cost.

Hope this step-by-step explanation helps you solve questions 3, 4, and 5!