Answer:
y < 160
Step-by-step explanation:
y + 20 < 180
     -20 < -20
y < 160
y is less than 160
 
        
                    
             
        
        
        
1/9 of total marbles = 1/9 × 36 = 4
so Alexis gave 4 marbles to Sara. 
And so Alexis is left behind with 32 (36-4) marbles and so Sara have 4 marbles now
        
                    
             
        
        
        
Answer:
100% increase 
Step-by-step explanation:
Calculate percentage change
from V1 = 20 to V2 = 40
(V2−V1)|V1|×100
=(40−20)|20|×100
=2020×100
=1×100
=100%change
=100%increase
 
        
             
        
        
        
A direct variation is a mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other. In other words, a direct variation is where 

.
In answer a, 

, so it is a direct variation.
In answer c, 

, so it is a direct variation.
In answer d, 

, so it is a direct variation,
Only answer b is left, which means the answer must be 'b'. 
We also know 'b' is the answer because it cannot be expressed as <span>

. Instead, it is expressed as </span>

, which is not the same thing and is therefore not a direct variation.
Hope I helped, and let me know if you have any questions :)
 
        
        
        
Answer:
the photo is black..i cant see the question... 
Step-by-step explanation: