It is substitution. Because you are substituting 3=y into x+5=3
Answer:
The range is all real numbers.
Step-by-step explanation:
Range is simply all the y-values you could have when you substitute any given x-value.
Domain refers to all x-values that can be substituted into a function.
In the case of linear functions with a gradient, which are line equations, both the the domain and range are always "all real numbers" because any x-value can be substituted into the function and any y-value can be generated.
$4.15n - ($250 + $2.45n)
Now that we have our expression, let's set it greater than or equal to 0
$4.15n - ($250 + $2.45n) >= 0
Let's simplify the left side.
$4.15n - $250 - $2.45n >= 0.
Combine like terms.
$1.7n - $250 >= 0
Add $250 to both sides.
$1.7n >= $250
Divide both sides by $1.7
n >= 148
You would need to make 148 light sabers to make a positive profit.
