The equation x2 + y2 - 2x + 7y + 1 = 0 can be rewritten as which of the following equations?
(x + 1)2 = (y + 2 ) 2 = 1 2 1 2
(x-172 + (y + 2 2 1 2 = 1 = 12
(x + 12 + (x + 772 = 72
(x-12 + (y + 7) 2 = 72
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(x-12 + (y + 7) 2 = 72

Step-by-step explanation:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

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step-by-step explanation: