Mischa wrote the quadratic equation 0=-x2+4x-7 in standard form. If a = -1, what is the value of c in her equation?

In standard form, a quadratic is written as 0 = ax² + bx + c, where c is the constant term. In Mischa’s equation, 0 = -x² + 4x - 7, the constant term is -7. Therefore, c = -7, which is choice A.

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