Answer:C
Step-by-step explanation:
The answer for f(x)-g(x) is
.The solution can be obtained by use of concept of functions.
<h3>What is a function?</h3>
A function, in mathematics, can be defined as an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).It useful in mathematical representation of scientific quantities.
We can perform addition and subtraction operations on functions.
The given function f(x) and g(x) are

The solution for f(x)-g(x) is
.
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Answer:
Step-by-step explanation:
He has 42.80
Call x the amount that he will have
If he pays 12 to Rita, x = 42.80 - 12
If he receives 12 from Rita, x = 42.80 + 12
From the first equality
x - 42.8 = -12
From the second equality
x - 42.8 = +12
Then |x - 42.80| = 12
The first one is x=4.16z
The second one is x=1.16z
The third one is x=6z