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OpenStudy (anonymous):
Subtract (3x - 30) from the sum of (-2x + 1) and (9x - 9). Choose one answer. a. 10x - 38 b. -4x - 22 c. 8x + 40 d. 4x + 22
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Directrix (directrix):
d. 4x + 22
Directrix (directrix):
(-2x + 1) + (9x - 9) - (3x - 30) = 7x -8 - (3x - 30) = 7x - 8 - 3x + 30 = 4x +22
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