The solutions will lie  in all the four quadrants.
y≤2/7x+1
We have the following inequality:
y=2/7x+1
If x=0
y=2/7(0) +1
y=1
If y=0
x=-3.5
So the line passes through the points:
(0,1) and (-3.5,0)
To find the shaded region, let us take a point, namely, the origin and test it in the inequality:
y≤ 2/7x +1
0≤ 2/7(0) +1
0≤ 1 which is true
Since this is true, then the shaded region includes this point. This is shown below and as you can see the solutions exist in all four quadrants.
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Answer:
10 if there is an error in the question (and of the pizza for dinner.) 
or 20 
Step-by-step explanation:
Just add what he ate for lunch and dinner
It never said how he cut his pizzas. Also it never said if he finished it or not.
 
        
             
        
        
        
Answer:
x+2 
Step-by-step explanation:
if a to the power of b is equal to x then a to the power of b +2 is x+2