Question

Collin noticed that various combinations of nickels and dimes could add up to $0.65. let x equal the number of nickels let y equal the number of dimes what is the domain where y is a function of x and the total value is $0.65?

Answer 1

Defining variables we have:
y = the number of dimes
x = the number of nickels
0.05x + 0.1y = 0.65
We clear y:
y = (- 0.05x + 0.65) / (0.1)
y = -0.5x + 6.5
The domain will be:
(0, 13)
Answer:
the domain where and is a function of x is:
(0, 13)
and the total value is $ 0.65 when
x = 1
y = 6