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

Question

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

Accepted Answer

∻Solution by Steps∻ ‖ step 1 ⋮ To find the cost of 2 folders when 3 folders cost $2.91, we need to set up a proportion where the number of folders is directly proportional to the cost. ‖ ‖ 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.⚹◊What is the cost of 1 folder based on the information given in the question?⍭ Generate me a similar question◊

Sia