Marquetta sells hand-knit sweaters at a handicrafts market. Each sweater sells for $50. The wool costs Marquetta $30 per sweater and there is a booth fee of $25. How many sweaters must she sell to make a profit?

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graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

the answer is 5/14.

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