Find the equation of the axis of symmetry of the following parabola algebraically. y=−x ^2 +8x−12

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Which of the following represents the zeros of f(x) = 6x3 − 31x2 + 4x + 5? −5, one third , one half 5, − one third , one half 5, one third , − one half 5, one third , one half

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?