Respuesta :

MarkV
Hi there! The answer is B.

The sum of the angles in a triangle is always 180°.

We can also express the sum of the angles in terms of y. The sum will be:
[tex]2y + y + 10 + 50[/tex]

Collect the terms.
[tex]3y + 60[/tex]

We can now set up and solve an equation.
[tex]3y + 60 = 180[/tex]

Subtract 60 from both sides.
[tex]3y = 120[/tex]

And finally divide both sides by 3.
[tex]y = \frac{120}{3} = 40[/tex]

Hence, the answer is B.
~ Hope this helps you!
VictorZ
Hi there!

The sum of all th' angles of a triangle is always 180°

Acc'rding to the Question :-
Sum of all the angles in terms of " y " = 180°

⇒ 2y + y + 10° + 50° = 180°

⇒ 3y + 60° = 180°

⇒ 3y = 180° - 60°

⇒ 3y = 120°

⇒ y = [tex]\dfrac {120°}{3}[/tex] = 40°

Hence,
Option (C.) is Correct.

~ Hope it helps!

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