Answer:

Step-by-step explanation:
sum of interior angles in a triangle is 180 degree
interior angles are (5x+3y)∘,(3x+20)∘, and (10y+30)
add all the angles and make it equal to 180

combine like terms


subtract 50 from both sides

Answer: true
Step-by-step explanation: because i learned last year in my accelerated math class about this and we did a quizlet on it and it had a question like that on the quiz.
Answer:
100 in
Step-by-step explanation:
8 x 12 + 4
96 + 4 = 100
Answer:
If you divide the numbers you should get 199.