Identifying the values a, b, and c is the first step in using the Quadratic Formula to find solution(s) to a quadratic equation. What are the values a, b, and c in the following quadratic equation?

18 = −9x + 7x2.
A: a = 18, b = 9, c = −7
B: a = 18, b = −9, c = 7
C: a = 7, b = 9, c = 18
D: a = −7, b = 9, c = 18

the terms of a geometric sequence can be found by beginning with the first term and multiplying by the common ratio repeatedly. a recursive formula for a geometric sequence with common ratio r is given by an=ran−1 a n = r a n − 1 for n≥2 n ≥ 2 .

step-by-step explanation:

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step-by-step explanation:

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the formula of a midpoint between a abd b: