Question

Math

Posted 3 months ago

```
3 folders cost $\$ 2.91$.
Which equation would help determine the cost of 2 folders?
Choose 1 answer:
(A) $\frac{2}{\$ 2.91}=\frac{x}{3}$
(B) $\frac{2}{x}=\frac{3}{\$ 2.91}$
(C) $\frac{x}{2}=\frac{3}{\$ 2.91}$
(D) $\frac{2}{x}=\frac{\$ 2.91}{3}$
(E) None of the above
```

Sign in to unlock the answer

Answer from Sia

Posted 3 months ago

Solution by Steps

step 2

The correct equation should relate the cost of 2 folders (let's call it $x$) to the cost of 3 folders ($\$2.91$). Since 3 folders cost $2.91, we can write the proportion as$\frac{x}{2} = \frac{\2.91}{3}

step 3

This equation can be solved to find the value of $x$, which represents the cost of 2 folders

C

Key Concept

Proportions and Direct Variation

Explanation

When quantities vary directly, their ratios are equal, which is the basis for setting up proportions to solve for an unknown value.

Not the question you are looking for? Ask here!

Enter question by text

Enter question by image

Upgrade to Asksia Pro

Join a AskSia's Pro Plan, and get 24/7 AI tutoring for your reviews, assignments, quizzes and exam preps.

Unlimited chat query usages

Strong algorithms that better know you

Early access to new release features

Study Other Question