The x-coord. of the vertex is halfway between the given zeros. Here, it'd be halfway between x=3 and x=9, which comes out to x = 6 (answer).
Answer:
supplementary angles
Step-by-step explanation:
they are on the same line, so they sum up to 180°
<span>|-21| > 19 I believe! I hope this helps! & have a great day!!!!</span>