<u>ANSWER</u>


<u>EXPLANATION</u>
To find the value of a function, f(x) at a given value x=a, we plug in x=a into f(x) to obtain f(a) in simplified form.
The first function is

To find f(7), we substitute x=7, into the function.

The second function is

To find f(4), we replace x with 4 to obtain,


Answer:
D $19.62
Step-by-step explanation:
$15+9%=16.35
15+1.35=16.35
16.35+20%=19.62
16.35+3.27=19.62
Answer:

Step-by-step explanation:
The given expression is

We have to find the value of given expression when -x=-4/5 and y= 1/3.
Substitute -x=-4/5 and y= 1/3 in the above expression, to find the value of given expression when -x=-4/5 and y= 1/3.

After multiplication we get

Taking LCM, we get



Therefore, the value of given expression is
.