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

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.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.