Need help with all of these problems

Solve for x, y, and z. show all steps.

What is the ratio fraction form of 25: 9

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?