Answer:
c=5
Step-by-step explanation:
5
 
        
             
        
        
        
Put -4 in place of x
-4 to the second power is 16 so it would be 16-(-12)= 28
        
             
        
        
        
Answer:
18m
Step-by-step explanation:
Since the given traingles are similar
We get






Hence the distance across river is 18m
 
        
             
        
        
        
To find the answer, you need to solve for b.
2(2b + 3) = 12  divide both sides by 3
2b + 3 = 6  divide both sides by 2
2b = 3  subtract 3 from both sides
b = 1.5  divide both sides by 2
b = 1.5 satisfies the equation. if you plug 1.5 in, you get that the equation is true.