Slope = (y2-y1)/(x2 - x1) 
Slope = (9 - 6)/(-3- (-9)) = 3/6 = 1/2
Answer: 1/2
 
        
                    
             
        
        
        
What is JkL
Because i need to know.Btw sorry for using p the answer board <span />
        
             
        
        
        
Step-by-step explanation:
"congruent" for lines simply means they are equally long.
15. yes. AB = EF = 3
16. yes. BD = DF = 8
17. no. AC = 5, CD = 6
18. yes. AC = DE = 5
19. no. BE = 13, CF = 14
20. no. CD = 6, DF = 8
 
        
             
        
        
        
Answer:
Quantity of heat needed (Q) = 722.753 × 10³ 
Step-by-step explanation:
According to question, 
Mass of water (m) = 40 kg
Change in temperature ( ΔT) = 18°c
specific heat capacity of water = 4200 j kg^-1 k^-1
The specific heat capacity is the amount of heat required to change the temperature of 1 kg of substance to 1 degree celcius or 1 kelvin .
So, Heat (Q) = m×s×ΔT
 Or,          Q = 40 kg × 4200 × 18
 or,           Q = 3024 × 10³ joule 
Hence, Quantity of heat needed (Q) = 3024 × 10³ joule    
In calories 4.184 joule = 1 calorie 
So, 3024 × 10³ joule = 722.753 × 10³ 
 
        
             
        
        
        
Arrange your given equation to resembles the form 
a^2 +2ab+ b^2 because this equals (a+b)^2
So we get:
y^2+16y+8^2=0
Now compare 
y^2+16y+8^2 to a^2 +2ab+ b^2
So we got
y^2+2•8 y+8^2=0 which equals (y+8)^2