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[tex]\( y \)[/tex] varies inversely as [tex]\( x \)[/tex]. [tex]\( y = 12 \)[/tex] when [tex]\( x = 5 \)[/tex]. Find [tex]\( y \)[/tex] when [tex]\( x = 2 \)[/tex].

[tex]\[ y = \square \][/tex] (Simplify your answer.)


Sagot :

Certainly! Let's go through the problem step by step.

1. Understanding inverse variation: When [tex]\( y \)[/tex] varies inversely as [tex]\( x \)[/tex], it means that the product of [tex]\( y \)[/tex] and [tex]\( x \)[/tex] is a constant. Mathematically, we can express this as:
[tex]\[ y \cdot x = k \][/tex]
where [tex]\( k \)[/tex] is the constant.

2. Finding the constant [tex]\( k \)[/tex]: Given in the problem, [tex]\( y = 12 \)[/tex] when [tex]\( x = 5 \)[/tex]. We can use these values to find the constant [tex]\( k \)[/tex]:
[tex]\[ 12 \cdot 5 = k \][/tex]
[tex]\[ k = 60 \][/tex]

3. Using the constant [tex]\( k \)[/tex] to find [tex]\( y \)[/tex] when [tex]\( x = 2 \)[/tex]:
We now use the constant [tex]\( k \)[/tex] to find the new value of [tex]\( y \)[/tex] when [tex]\( x = 2 \)[/tex]. We use the inverse variation equation again:
[tex]\[ y \cdot 2 = 60 \][/tex]

4. Solving for [tex]\( y \)[/tex]:
[tex]\[ y = \frac{60}{2} \][/tex]
[tex]\[ y = 30 \][/tex]

Thus, when [tex]\( x = 2 \)[/tex], the value of [tex]\( y \)[/tex] is [tex]\( 30 \)[/tex].