Answer: -11 & 9
Step-by-step explanation: Coefficients are the numbers before the variables.
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!
~
The estimate would be 2+3 5+2 and 6+1
so 577
you can also just round and do 250 +300= 550 +20=570
0.99999696 is your answer I am pretty sure.
Answer:
a diagram in which the numerical values of variables are represented by the height or length of lines or rectangles of equal width.
Step-by-step explanation: