If the 2 given points are endpoints, then we're in business. The formula for the midpoint is

. If the endpoints of our segment are the coordinates (1,2) and (12,14), our formula would be filled in as follows:

which simplifies to (13/2, 8). See? It's pretty simple once you know how to do it.
B for 8 would be 6.2
b for 9 would be 7
The b is adding 0.8 each time
Hope this helps!
Simple....
you have:

to convert them into
improper fractions:
1.) Take whole number*denominator
(5*5=25)
2.) Take what you got...and
add the numerator
(25+2=27)
3.) Use the original denominator

Do the same to the other one...
2*13=26
26+10=36

Now..add...

But..you need a common denominator!


Now you can add!

When simplified....

Thus, your answer.
You use the distributive property and multiple everything inside of the parentheses by 2x^2 then everything in the parentheses by y to get 2x^4y-6x^3y^2+16x^2y^3. I think that’s the answer and I hope that helped!