Answer:
There is not enough to solve.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Option B) The variable Y will cancel out first.
Step-by-step explanation:
we have
5x-y=-21 ----> equation A
x+y=-3 ----> equation B
Solve by elimination
Adds equation A and equation B
5x-y=-21 
x+y=-3
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5x+x=-21-3 ----->variable y will be eliminated first
6x=-24
x=-4
 
        
             
        
        
        
Y=x^2
substitute the values into the original equation
0=4^2
0=16
No it does not satisfy the equation because 0 does not equal to 16
        
             
        
        
        
Answer:
a
Step-by-step explanation:
 
        
             
        
        
        
In 1 hour you'll have 4 cells so multiply that by 3 and you will have 12 cells in 3 hours