Answer:
The cost of the old ball was $100.
Step-by-step explanation:
The cost of the new ball = $300
The new ball has three times the price of his old ball.
So, let the price of the old ball be = x
As per situation, we get the equation:

Dividing both sides by 3:

=> x = 100
Hence, the cost of the old ball was $100.
Answer:
b > 100
Step-by-step explanation:
Answer: 11/20
55/100 simplified is 11/20
Sin is x
tan is y
Hope this helped☺☺