C- Commutative property.
Explanation: The numbers are flipped around, but still give you the same answer!
14x0.75=10.5
15-10.5=4.5
so she will get $4.50c
Hope this helps! :D
In the general case, it is (x, y+3), where y = f(x).
I think it might be pairs 2 & 3
First let's rewrite it...
18a^2 + 20a + 8
Factor out a 2
2 (9a^2 + 10a + 4)