Please help due today

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Translate the following situation into an inequality statement . lily has $25 to spend on a charm bracelet for her sisters birthday gift the cost of the bracelet is $12 plus $1.50 per charm

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4