Question

Suzanne buys a pair of shoes. A 9% sales tax is added to the purchase.
Which function shows the total cost for any pair of shoes with a price of x?

f(x) = 0.09x – 10
f(x) = 1.09x
f(x) = 0.9x
f(x) = 1.9x

Answer 1

The function which represent the total cost of pair of shoes bought by Suzanne including the 9% sales tax is,

What is a Function?

A function assigns the value of each element of one set to the other specific element of another set.

Suzanne buys a pair of shoes. A 9% sales tax is added to the purchase. Let any pair of shoes has a price of x when sales tax is not added.

The function which represent the total cost including the sales tax is,

$f(x)=x+\dfrac{9}{100}x\\f(x)=x+0.09}x\\f(x)=1.09}x$

Hence, the function which represent the total cost of pair of shoes bought by Suzanne including the 9% sales tax is,

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