A fruit juice recipe calls for 2 parts orange juice and 8 parts pineapple juice. Which proportion can be used to find the amount of orange juice, [tex]$j$[/tex], that is needed to add to 13 L of pineapple juice?

A. [tex]\frac{2}{8} = \frac{j}{13}[/tex]
B. [tex]\frac{8}{2} = \frac{13}{j}[/tex]
C. [tex]\frac{6}{1} = \frac{2}{18}[/tex]
D. [tex]\frac{16}{18} = \frac{1}{100}[/tex]



Answer :

To solve the problem correctly, let's ensure we understand the necessary proportions for the juice mixture and verify if any provided choices match this proportion.

1. According to the recipe, the correct proportion is 2 parts orange juice to 13 parts pineapple juice (as you need to figure out the proportion with 13 liters of pineapple juice).

We will go through each given choice to see if any satisfy the same proportional relationship:

First choice: [tex]\(\frac{2}{8} = \frac{1}{10}\)[/tex]

- Cross-multiplication: [tex]\(2 \times 10 = 8 \times 1\)[/tex]
- [tex]\(20 \neq 8\)[/tex]
- This proportion does not hold true.

Second choice: [tex]\(\frac{8}{2} = \frac{1}{18}\)[/tex]

- Cross-multiplication: [tex]\(8 \times 18 = 2 \times 1\)[/tex]
- [tex]\(144 \neq 2\)[/tex]
- This proportion does not hold true.

Third choice: [tex]\(\frac{6}{1} = \frac{2}{18}\)[/tex]

- Cross-multiplication: [tex]\(6 \times 18 = 1 \times 2\)[/tex]
- [tex]\(108 \neq 2\)[/tex]
- This proportion does not hold true.

Fourth choice: [tex]\(\frac{16}{18} = \frac{1}{100}\)[/tex]

- Cross-multiplication: [tex]\(16 \times 100 = 18 \times 1\)[/tex]
- [tex]\(1600 \neq 18\)[/tex]
- This proportion does not hold true.

Upon examining all the provided choices, we see that none of them correctly reflect the proportion [tex]\(2 \text{ parts orange juice} : 13 \text{ parts pineapple juice}\)[/tex].

Therefore, there is no correct match in the provided choices for the required proportion.