Factor the numerator to get:
(-3z(z+5))/(z+5) now you notice that (x+5) cancel out leaving:
-3z
Hello,

=70 (sum of angles of a triangle=180°)

supplementary angles

translation BC

image of the angle DAB by the axis symmetry DB

opposed angles of a parallelogram
are supplementary.

opposed angles by the vertex

alterne-interne angles (sorry for the words English is difficult for me)
Answer:
how is this mathematics?
Step-by-step explanation:
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