does anyone know how what the angles would equal based on the diagram? any help will be appreciated:) <3

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

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.