Yes, there was a mistake in applying the distributive property. If you have to perform

you have to multiply both terms in the parenthesis by 3, not just the first one.
So, the correct expansion would be

1/2 chance of getting an even number and 1/2 chance of getting an odd one.
Answer:
270
Step-by-step explanation:
-6 multiply 5 gives you -30
-3 multiply -3 gives you -9
-30 multiply 9 gives you
-270
(0,-9) could be a solution