The answer is your welcome
        
             
        
        
        
Answer:
A) y=x+1
Step-by-step explanation:
y-y1=m(x-x1)
m=(y2-y1)/(x2-x1)
m=(9-5)/(8-4)=4/4=1
y-5=1(x-4)
y-5=x-4
y=x-4+5
y=x+1
 
        
                    
             
        
        
        
Answer:
15.
   x = 40/9 = 4 4/9
   z = 24/5 = 4 4/5
17.
   x = 50
   y ≈ 11.5
Step-by-step explanation:
15. Corresponding segments are proportional:
   top right side / whole right side = x / 8
   5/(5+4) = x/8
   x = 8(5/9) = 40/9
   x = 4 4/9
__
   right side bottom / right side top = z / 6
   z = 6(4/5) = 24/5
   z = 4 4/5
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17. The acute angles are complementary:
   x = 90 -40 = 50
__
From the Pythagorean theorem:
   y = √(15² -9.6²) = √132.84
   y ≈ 11.5
 
        
             
        
        
        
<h2>x = 3</h2>
Step-by-step explanation:


Step 1 Use 3 to open the bracket
Step 2: Collect like terms and simplify
Step 3: Divide both sides by 7