Question

3 folders cost $2.91 which equation would help determine the cost of 2 folders

Answer 1

Answer:

The equation that will determine the cost of two folders is;  3x = 2× $2.91

and  the cost of  the 2 folders is $1.94

Step-by-step explanation:

To solve this problem, we will follow the steps below;

Using proportion;

Let x be the cost of 2 folders

3 folders = $2.91

2 folders  =  x

Cross-multiply

3x = 2× $2.91

The equation that will determine the cost of two folders is

3x = 2× $2.91

We can go ahead and solve

3x = $5.82

Divide both-side of the equation by 3

$\frac{3x}{3}$  =  $\frac{5.82}{3}$

x = $ 1.94

The cost of 2 folders is $1.94

Answer 2

Answer:

2/x = 3/$2.91

Step-by-step explanation:

Let x represent the unknown cost of 2 folders. Since 2 folders cost x, we have the following proportion:

2/x

We can write the fact that 3 folders cost $2.91 as a proportion:

3/$2.91

The cost changes along with the number of folders purchased, and so the two proportions are equivalent.

2/x = 3/2.91

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