Write a system o three equations in three variables that has (3,5,2) as a solution.
2 answers:
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1. nth term=3n-1
20th term=3(20)-1=60-1=59
2. nth term=-2n-4
20th term=-2(20)-4=-40-4=-44
3. nth term=n-
20th term=(20)-
=
-
=
4. nth term=-n+
20th term=-(20)+
=-
+
=-
If BD=DC that means triangle CDB is isosceles triangle and the measure of angles ∡CDB and ∡BCD is the same
∡CDB=∡BCD=70°
The angles ∡ADB and ∡CDB are adjacent and suplementary angles
It means ∡ADB + ∡CDB = 180°
∡ADB = 180° - ∡CDB
∡ADB = 180° - 70°
<u>∡ADB = 110°</u>
∡CDB=∡BCD=70°
The angles ∡ADB and ∡CDB are adjacent and suplementary angles
It means ∡ADB + ∡CDB = 180°
∡ADB = 180° - ∡CDB
∡ADB = 180° - 70°
<u>∡ADB = 110°</u>