Which of the following is a reciprocal of 3/9?

It would be 3.

Step-by-step explanation:

So, a reciprocal is basically just flipping over the numerator and the denominator of a fraction. Therefore:

3/9 ---> 9/3

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )