Answer:
D.(1, -1, 2) hope this helps
 
        
                    
             
        
        
        
Answer:
270 cm^2
Step-by-step explanation:
This is quite easy. 
There is formula for it, the formula is bh/2 
b= is the base or side that the triangle's altitude or height is perpendicular to. 
h= is the height of the triangle or the altitude of the triangle. 
I can always like to thing that a triangle is like half of a rectangle because the area for a rectangle is bh, but in a triangle it is half the bh. 
b= 30
h=18 
Now substitute the values in the formula 
30(18)/2 
30 times 18 = 540
divide the product by 2
540/2 = 270 
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
1) Use square sum: (a + b)² = a² + 2ab + b².

<u>Therefor</u><u>,</u><u> </u><u>the</u><u> </u><u>answer</u><u> </u><u>is</u><u> </u><u>x</u><u>²</u><u> </u><u>+</u><u> </u><u>2xy</u><u> </u><u>+</u><u> </u><u>y</u><u>²</u>.
 
        
             
        
        
        
Answer: A= (3,-3) . B(4,1). C= (1,0)
Step-by-step explanation: