Hey there!
Basically it wants you to add 3 and 8 from each other, what ever the answer to that part, you multiply the result by 9
Here this is what i meant

Or you could do this method too!

They both give you the result of 
So, I am assuming your expression would look like this: 
Good luck on your assignment and enjoy your day!
~
Yes, that's quite true. It's also a real number, and a negative number.
Did you have a question to ask ?
Answer:
Yup! Great Job!
Step-by-step explanation:
Answer:
ab - ac + db - dc
Step-by-step explanation:
you distribute the variables inside the parenthesis