Answer:
2/5
Step-by-step explanation:
 
        
             
        
        
        
Answer:
y = -7x + 17
Step-by-step explanation:
you want to isolate the 'y' variable, start by distributing -7 on the right side
y + 4 = -7x + 21
now subtract 4 from each side
y = -7x + 17
 
        
                    
             
        
        
        
 Answer:
AC = BC = 5
AB = 5√2
∠A = ∠B = 45
∠A = 90
Step-by-step explanation:
AC = 5 ( Reason : 5 squares are present in between A and C )
Similarly,
BC = 5
<u>By Pythagoras theorem</u>,
(AB)² = (AC)² + (BC)²
         = 5² + 5²
         = 2 * 5²
(AB)² = 2 * 5²
AB = 5√2
Since, sides AC and BC are equal, 
∠A = ∠B = 45
Since, AC is perpendicular to BC,
∠A = 90
 
        
             
        
        
        
#2 5.88 #3 6.510 #4 7.578 #5 9.835 #6 11.910 #7 3.72