Answer:
Step-by-step explanation:
Sum of angles in a Δ= 180°
x + 2x +3x = 180
6x= 180
Divide both sides by 6
x=30
sooo x= 1×30= 30, 2x= 2×30= 60, 3x=3×30= 90
since 30+60+90= 180
∴the angles are 30°,60° and 90° respectively

It is a function because here in case there is a value of y for x so it is a function.
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Confusing to me, sorry i cant help. I am not good with graphs.
Answer:
21/2 so 10.5.
Step-by-step explanation:
7÷2/3=21/2=10.5
hope this helps you