Get expert advice and community support for all your questions on IDNLearn.com. Get the information you need from our experts, who provide reliable and detailed answers to all your questions.
Answer:
3
Step-by-step explanation:
since the ratio is one to 3 there is one trombone for every 3 violas. you can find the answer by doing 9/3=3. so if there are 9 violas there are 3 trombones