Answer:
18°
Step-by-step explanation:
A diameter cuts a circle into two arcs that are each 180°. An inscribed angle that intercepts an arc of 180° has a measure of 90°. Thus we have ...
... 5x = 90°
.. 90°/5 = x = 18°
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2x+3=5x
3=3x
x=1
2(1)+3=
2+3=
5
your answer is 5
