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Jeans are on sale for 20% off the regular price.

Which function would give you the total cost for purchasing a pair of jeans that costs x dollars?

f(x) = 0.2x

f(x) = 0.2x - x

f(x) = x - 0.2x

Verified Answer :

carlosego

Keywords:

Function, variable, total cost, percentage, jeans

For this case we have a function of the form\(y = f (x)\), where \(f (x)\)represents the total cost of buying a pair of jeans, considering that they are 20% below the regular price given by the variable x.

So, if the pair of jeans costs x, we look for 20% of x.

x -----------> 100%

? -----------> 20%

Where "?" represents 20% of x. So, we have:

\(? = \frac {20 * x} {100}\\? = 0.2x\)

Thus, 0.2x represents the reduction of the total cost of the pair of jeans

Then, the function that gives the total cost of the pair of jeans, with a reduction of 20% is:

\(f (x) = x-0.2x\)

Answer:

\(f (x) = x-0.2x\)

Option C

Step-by-step explanation:

Function, variable, total cost, percentage, jeans


For this case we have a function of the form, where represents the total cost of buying a pair of jeans, considering that they are 20% below the regular price given by the variable x.


So, if the pair of jeans costs x, we look for 20% of x.


x -----------> 100%


? -----------> 20%


Where "?" represents 20% of x. So, we have:




Thus, 0.2x represents the reduction of the total cost of the pair of jeans


Then, the function that gives the total cost of the pair of jeans, with a reduction of 20% is:




Answer:  Option C


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