A. Independent variable: number of rubber stamps n sold. Dependent variable: F(n), the total sales.
B. Only whole numbers. It is impossible to have negative and/or fractional stamps.
C. F(n) = $4.95n, which is 4.95 times n.
So, plugin 5 for n

F(n) = $24.75
Answer:16.71 cm
Step-by-step explanation:
Given
Length of wire L=38 cm
One piece is bent in the form of square and another in the form of circle
let x be the length of circle
therefore length of square side 
A=total area of square and circle
radius of circle 
area of circle 
Area of square 

To get the minimum value of A we get




Therefore circumference of circle

Thank you lord lord thank lord lord
X+y=6
2x+y=4
solve the both
x+y=6
- (2x+y=4)
-x = 2
x=-2
substitute the value of x in x+y=6
-2+y=6
y=6+2
y=8
therefore the answer is (-2,8)