Answer:
Step-by-step explanation:

Answer:
2. x = 135
Step-by-step explanation:
im not sure about question 1
21:30 and 35: and 50 this is because 7 times 3 is 21, 10 times 3 is 30, and 7 times 5 is 35, and lastly 10 times 5 is 50

Hope that helps and hope you get better!
Answer:
irrational.
Step-by-step explanation:
0.7777... repeats and does not end so it is irrational