Select the correct answer.
What is the value of x in the triangle?

D

Step-by-step explanation:

Using the tangent ratio in the right triangle and the exacy value

tan30° = = , then

tan30° = = = ( cross- multiply )

3x = 15 ( divide both sides by 3 )

x = 5 → D

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180