Helping my sister with her homework

Which of the greatest common gcf of 32 and 48 a 16 b 96 c 8 d 32

Find the value of x for which line a is parallel to line b

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?