Answer:
a^2+b^2=c^2
Step-by-step explanation:
You can apply this formula to any quadratic equation.
 
        
                    
             
        
        
        
Answer:
KL= 63
Step-by-step explanation:
JK=7x+9 , JL=114 , KL=9x+9 ( if the points are on the same line and point J at the end point and K in the middle)
*J_______________________K___________________________L
JL=JK+KL
114=7x+9+9x+9
114-18=16 x
16x=98
x=98/16=6
KL= 9x+9
KL=9(6)+9
KL= 63 
 
        
             
        
        
        
Answer:
Demand is Elastic when Price > 200 ; Demand is inelastic when Price < 200 
Step-by-step explanation:
p = 400 - 4x 
4x = 400 - p 
x = (400 - p) / 4 → x = 100 - p/4 
Elasticity of demand  [ P ed ] = (Δx / Δp) x (p / x)
Δx / Δp  [Differentiating x w.r.t p]  = 0 - 1/4  → = -1/4 
P ed =  <u>-1</u> x<u> p </u>
             4   (400 - p)/4 
= <u>-1</u> x <u> 4p </u>              = -p / (400-p) 
   4   (400 - p)
Price Elasticity of demand : only magnitude is considered, negative sign is ignored (due to negative price demand relationship as per law of demand). 
So, Ped = p / (400 - p) 
Demand is Elastic when P.ed > 1 
p / (400-p)  > 1 
p > 400 - p 
p + p > 400  → 2p > 400 
p > 400 / 2 →  p > 200 
Demand is inelastic when P.ed < 1 
p / (400-p)  < 1 
p < 400 - p 
p + p < 400  → 2p < 400 
p < 400 / 2 →  p < 200 
 
        
             
        
        
        
Answer:
10y
Step-by-step explanation:
9y is equal to y+y+y+y+y+y+y+y+y.
If you add y to that you get (y+y+y+y+y+y+y+y+y)+y, which is equal to 10y.