First we find the measurement of dark dot .
ANd for that we have to use the formula of the angle formed by the intersection of chord .
Let the dark dot be t.
So we have
t and z are linear pair and sum of angles of linear pair =180 degree.
So we get
Lindsey and Will have online account for buying music. Lindsay's account is -$20 and Will's account balance is -$15. Express eac
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