Answer:
-9
Step-by-step explanation:
-1y+11=20
-11= -11
-1y=20-11
-1y=9
-9
Answer Is Option a)4.5 sq.units
Given vertices are X(2,1),Y(5,4) and Z(5,1)
Answer is given above in the image
If you have any doubts see the image or ask in comments box <em>.</em>
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Answer:

Step-by-step explanation:
There all 10 total options to choose from.
Denominator is 10.
There are 4 purple ones, so 
Answer:
Hm I dont know if im right but im thinking it's a scalene, because the sides are not equal, or a obtuse triangle, because one side is more than 90 degrees. Hope this helps!
Answer: -2
Step-by-step explanation: