Answer:
288in i belive
Step-by-step explanation:
The proportion would be 1/3 and x/9. Cross multiplication creates 3x=9. Divide both sided by three, and there are 3 trombones in the orchestra.
Answer:

Step-by-step explanation:
To add fractions <em>with the same denominator</em>, simply add the numerators:

So:

6*2 = 12
12/2 = 6
So, the answer could be 12/2