Answer:
The theorem here is essentially that
if a and 3 are disjoint sets with
exactly one element each, then their
union has exactly two elements. ...
Peano shows that it's not hard to
produce a useful set of axioms that
can prove 1+1=2 much more easily
than Whitehead and Russell do.
 
        
                    
             
        
        
        
Answer:
 B)max/ opens down
Step-by-step explanation:
Parabola equation:
The equation of a parabola has the following format:

If  , that is, x² is multiplied by a positive number, the function has a minimum value and the parabola opens up.
, that is, x² is multiplied by a positive number, the function has a minimum value and the parabola opens up.
If  , that is, x² is multiplied by a negative number, the function has a maximum value and the parabola opens down.
, that is, x² is multiplied by a negative number, the function has a maximum value and the parabola opens down.
In this question:

From the graph, we already see that it opens down and has a max, and analitically, since  , this is confirmed. The correct answer is given by option b.
, this is confirmed. The correct answer is given by option b.
 
        
             
        
        
        
14.2 - 2.2 - 1
12 -1
11 
Hope this helps
        
                    
             
        
        
        
Answer:
9 wagon stamps and 1 sailboat stamp!
Step-by-step explanation:
7×4= 28
28+3=31