3(9+c+b) if c=13 and b=4

Ineed me i stuck and i don’t want to get it wrong

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

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?