Someone , i do not understand. what is the quadratic function that is created with roots -10 and -6 and a vertex at (-8, -8)? what is the quadratic function that is created with roots at 2 and 4 and a vertex at (3, 1)? i've actually been trying to figure this out for days, but every time i think i have the right answer and understand how to form the quadratic function, i double check it on a calculator and it doesn't make sense. could someone me out and explain this to me?

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? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.