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Jill makes purses and backpacks. To make each purse, she uses 1 foot less than 1/2 the amount of fabric she used to make a backpack. Write an expression for the amount of fabric that Jill needs to make a purse. If she uses 7 feet of fabric to make a backpack, how many feet of fabric will she use to make a purse?

Respuesta :

Let x be the amount of fabric used to make a backpack, and

y be the amount of fabric used to make purse.

The expression is now

[tex]\begin{gathered} y=\frac{1}{2}x-1 \\ \\ \text{IF }x=7,\text{ THEN} \\ y=\frac{1}{2}(7)-1 \\ y=\frac{7}{2}-1 \\ y=3.5-1 \\ y=2.5 \end{gathered}[/tex]

Therefore, she needs 2.5 feet of fabric to make a purse.

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