Mrs. Edwards displays a fraction model on the board. What product is represented by this fraction model

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

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?