Respuesta :

Answer:

Step-by-step explanation:

By definition, CD is an angle bisector.  What that does is creates proportionality between the sides of each respective triangle.  Here's the proportion:

[tex]\frac{4}{3} =\frac{7.5}{x}[/tex]

Cross multiply to get 4x = 22.5  and

x = 5.625

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