Given:
y is directly proportional to x.
 when
 when 
To find:
The equation that connects y with x.
Solution:
It is given that, y is directly proportional to x. So,

 ...(i)
                     ...(i)
Where, k is the constant of proportionality.
We have,  when
 when  . Substituting these values in (i), we get
. Substituting these values in (i), we get
 
 
Divide both sides by 5.
 
 
 
 
Substituting  in (i), we get
 in (i), we get
 
  
Therefore, the required equation is  .
.
 
        
             
        
        
        
220.5
i dont know how to show my work sorry :) hope it helps
 
        
             
        
        
        
The formula can be written in the form ...
... T = (original temperature) + x·(change in temperature each minute)
The problem statement gives you the original temperature (21 °C) and tells you the temperature after 12 minutes. You have to use that information to figure out the change in temperature each minute.
The change in temperature in 12 minutes is (75 °C) - (21 °C) = 54 °C. That is the change in 12 minutes, so the change in 1 minute will be 1/12 of that:
... 54/12 = 4.5
Using this value in the equation for T, we have
... T = 21 + 4.5x
 
        
             
        
        
        
Part a - triangles EGD and FGD are similar
part b - we know this because they have the same interior angles. both are 45,45,90 triangles
        
             
        
        
        
<h3>
Answer:  35°</h3>
Reason: The angle bisector cuts the original angle (70°) in half to get 70/2 = 35.