Answer:
A trick I did when it comes to multiplying by 10, is just add a 0 at the end of the number your multiplying. Try for yourself!
Y-65=3(x-49) 3 is time 49 is crushed
Answer:

Step-by-step explanation:
The bill = $190
Less flat fee = 25
Work done = $165

1)

2)

each of other angles measures 82.5 degrees
3)

4)sorry I don't know the last one