Neither P, nor A are on the sketch 
I guess P is the upper right corner of the rectangle 
and A=(0,1) 
P belongs to the line going through (1,0) and B(0,y) 
<span>but we don't know the y-coordinate of B </span>
<span>the triangle is right and isosceles, so pythagoras a²+a²=2² ... 2a²=4 ... a²=2 ... a=sqrt2 </span>
now look at the right triangle BOA 
<span>his hypotenuse is AB=sqrt2 and the <span>the kathete</span> OA is 1 </span>
so y²+1²=(sqrt2)² ... y²+1=2 ... y²=1.. y=1 
so the coordinates of B are (0,1) 
the line going through (1,0) and (0,1) is L(x)=-x+1 
P belongs to this line, so the coordinates of P are P(x,-x+1) (0<x<1) 
b) so if that's P, the height of the rectangle is -x+1 and the width=2x 
<span>so its area A(x)=2x*(-x+1)= -2x²+2x 
I hope my answer has come to your help. Thank you for posting your question here in Brainly.
</span>
        
             
        
        
        
Answer:
can be fourth one cause it starts at 2 on y axis. ( fourth option) 
Step-by-step explanation:
can't be the first one cause it starts at origin
can't be second one cause it starts at -2 on x axis 
can't be third on cause it starts on 2 on x axis 
can't be fifth cause it starts on -2 on y axis. 
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
well if you multiply each of tjem you would only sabe money on c the other choices would cause you to lose money so its c
 
        
             
        
        
        
1. k+5=11
2. 7n=42
3. l+13=17 
4. 10- p²=9
5. x²+y²=4