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3 years ago

What is the value of y? A. 50 B. 60 C. 30 D.40

Mathematics

1 answer:

Archy [21]3 years ago

4 0

Answer: The correct answer is D, y = 40

Step-by-step explanation: The first thing to note is the rule stating that sum of angles in a triangle equals 180 degrees. We have been given three angles which are, 2y, y+ 10 and 50.

If the sum of the angles in a triangle equals 180, then

2y + (y + 10) + 50 = 180

2y + y + 10 + 50 = 180

3y + 60 = 180

Subtract 60 from both sides of the equation

3y = 120

Divide both sides of the equation by 3

y = 40.

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