Final answer:
To simplify 3u / 9(u + v), factor out the common terms and cancel them, leading to the simplified form u / 3(u + v), which is option A.
Step-by-step explanation:
To simplify the expression 3u / 9(u + v), you need to follow these steps:
- Factor the numerator and the denominator. Here, you can factor out a 3 from the denominator.
- After factoring, the expression will look like this: (3u) / (3 * 3(u + v)).
- Next, cancel out the common factor of 3 in the numerator and denominator. This gives u / (3(u + v)).
Therefore, the simplified expression is u / 3(u + v), which corresponds to option A.