Question

PLZ HELP!!! I don't understand.

Answer 1

Answer:

Step-by-step explanation:

14.)

lets first find x:

2x+x+90=189

3x=90

x=30

lets find y:

2y=x

2y=30

y=15

lets find z:

2y+z=180

30+z=180

z=150

Answer 2

Answer:

14)

x = 30°

y = 15°

z = 150°

15)

x = 10°

y = 25°

Step-by-step explanation:

14)

3x = 180 - 90

x = 30

2y = x = 30

y = 15

z = 180 - 2y = 180 - 30 = 150

15)

3x = 5x - 20  because they are alternate interior angles

subtract 5x from each side of the equation:

-2x = -20

Divide both sides by -2:

x = 10°

The sum of the interior angles of any triangle = 180°

2y + 4Y + (5x - 20) = 180°

combine like terms:

6y + 5x - 20 = 180°

add 20 to each side:

6y + 5x = 200°

substitute for x:

6y + 5(10) = 200°

subtract 50 from each side:

6y = 150°

divide both sides by 6:

y = 25°