Answer:
What the hell AC is not given so you can't find the Perimeter 
Step-by-step explanation:
        x+10=0
        x=-10
AB=x+5
         AB=-5
BC=x-2
         BC=-12
Area of ABC = 30cm2
<u>Perimeter of ABC = AB+BC+</u><u>AC</u>
<u />
 
        
             
        
        
        
Steps?
A graph shows zeros to be ±3. Factoring those out leaves the quadratic
  (x-2)² +1
which has complex roots 2±i.
The function has roots -3, 3, 2-i, 2+i.
 
        
        
        
Answer:
x=-3 and y=-2
Step-by-step explanation:
let the numbers be x and y 
x+y=-5
x-y=-1
therefore x=-5-y
-5-y-y=-1
-2y=-1+5
-2y=4
y=-2
×=-5-(-2)
x=-5+2
x=-3
 
        
                    
             
        
        
        
Answer:
7
Step-by-step explanation:
<u>3 </u>+ 4 = 7.
So, therefor, x = 3