Answer:
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Step-by-step explanation:
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Since BD is the perpendicular bisector of AC, then AB = BD, so:
6x = x+15
5x=15
x=3
CB = 3+15 = 18
C) a relation is when an x value is correlated with only one y-value. If this is not the case, the equation siezes to be a relation.
Hope I helped :)
Answer:

Step-by-step explanation:
In any right triangle, the cosine of an angle is equal to its adjacent side divided by the hypotenuse, or longest side, of the triangle.
Therefore, we have:
