In your notebook, set up the following addition using a vertical format and find the sum of the given polynomials. 2mn + 4n 2 and 5m 2 - 7mn 9m2 + 9mn - 4n2 5m2 - 14mn - 4n2 5m2 - 5mn + 4n2 5m2 + 5mn - 4n2

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?