Step-by-step explanation:
When the number is inside the parenthesis. It means horizontal shift. Now negative is to the right and positive is to the left. Since it is negative 7 it would be 7 units to the right
any more help just ask :)
 
        
                    
             
        
        
        
Answer: y = 7.5
Step-by-step explanation:
Suppose that y varies directly with x
That is, y∝x
Convert y∝x to a full equation by introducing a constant k to the right hand side.
Therefore, y = kx
Given that y = 10 and x = 20
Substitute y and x in the equation above. We have;
10 = k(20)
10 = 20k
20k = 10
k = 10/20
k = 0.5
Since k = 0.5, the equation y = kx becomes y = 0.5x
Now, to find y if x = 15, substitute x in equation y = 0.5x
Therefore, y = 0.5(15)
y = 7.5
 
        
             
        
        
        
Multiplying the number by 1,000
 
        
             
        
        
        
The is a 50% chance of being a boy or a girl.....previous siblings do not matter. Every child is an independent event. So even if u had 2 siblings that were boys, the result of the next one being a boy is still gonna be 50%...just as the odds of it being a girl, is 50% as well.
        
                    
             
        
        
        
Answer:
correct option is C)  2.8
Step-by-step explanation:
given data 
string vibrates form =  8 loops
in water loop formed =  10 loops
solution
we consider  mass of stone = m
string length = l 
frequency of tuning = f 
volume = v 
density of stone =  
 
case (1)  
when 8 loop form with 2 adjacent node is  
 
so here 
 ..............1
      ..............1

and we know velocity is express as
velocity = frequency × wavelength   .....................2
 =   f ×
   =   f ×  
 
here tension = mg 
so 
 =   f ×
   =   f ×  ..........................3
     ..........................3
and 
case (2)  
when 8 loop form with 2 adjacent node is  
 
 ..............4
      ..............4

when block is immersed 
equilibrium  eq will be 
Tenion + force of buoyancy = mg 
T + v ×  × g = mg
 × g = mg 
and 
T = v ×  - v ×
 - v ×  × g
 × g     
from equation 2 
f ×  = f  ×
 = f  ×  
  
 .......................5
     .......................5 
now we divide eq 5 by the eq 3 

solve irt we get 

so 
relative density 
relative density = 2.78 ≈ 2.8 
so correct option is C)  2.8