Answer:
Question D: what type of chips do students in this class prefer?
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Step-by-step explanation:
it's another one of those similar triangles
it's easier to see this one. 
t /c = u / b
where 
t = 7x + 3
c = 27
u = 35
b = 21
plug in the knowns
7x + 3 / 27 = 35 / 21
7x + 3  = 27 ( 35 / 21 )
7x + 3 = 9 ( 35 / 7 )     ( divided by 3 )
7x  + 3  = 9 ( 5)     ( 7 into 35 =5 )
7x  + 3  = 45
7x = 45 - 3
7x = 42  
x = 6
I checked it, the ratio is 1_2/3  :) for both, but you can check it too 
 
        
             
        
        
        
Answer:
Find the value of x the value is x=4
3x4=12
12-5=7
Step-by-step explanation: