Answer:
It should be 2.
Step-by-step explanation:
The slope for this graph is 1/2 or 1 horizontal for every 2 verticals.
Answer:
or 
Step-by-step explanation:

Add
on both sides.


Combine like terms;

Use the quadratic formula;
a=4
b=17
c=12




or 
Answer:
95%
Step-by-step explanation:
%Change from 800 to 40 = %Decrease
%Decrease = Old Value - New Value/Old Value × 100%
%Decrease = 800-40/800 × 100%
%Decrease = 760/800 × 100%
% Decrease = 95%(Answer)
Im pretty sure its
2ab + 2bc + 2ac