Given the system of equations, what is the value of the system determinant? x + y = 8 x - y = 10 a. 0 b. -1 c. -2 given the system of equations, what is the value of the y-determinant? 3x + y - 10 = 0 4x - y - 4 = 0 a. -28 b. -14 c. 28

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?