Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

In the figure above, x = 60 and y = 40. If the dashed lines bisect the angles with measures of x° and y°, what is the value of z?

(A) 25

(B) 35

(C) 40

(D) 45

(E) 50

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