Answer:
$11.8525
Step-by-step explanation:
To find the total price of purchase including sales tax, we need to add sales tax to our total. This can be done as follows: Purchase price + percentage of purchase price as according to sales tax. In the case of your problem, this takes the form of $11 + 0.0775(11). This expression is equivalent to 11.8525.
Noah made 80 cookies and sold 72. This means that 8 cookies were left.
Two or more independent functions (say f(x) and g(x)) can be combined to generate a new function (say g(x)) using any of the following approach.


And many more.
The approach or formula to use depends on the question.
In this case, the combined function is:

The savings function is given as

The allowance function is given as:

The new function that combined his savings and his allowances is calculated as:

Substitute values for s(x) and a(x)

Open bracket

Collect like terms


Read more about functions at:
brainly.com/question/15458447