Answer:
-3
Step-by-step explanation:
5•-3=-15
4•-3=-12
-15+3=-12
 
        
                    
             
        
        
        
Answer:
a) 7 weeks b) George's
Step-by-step explanation:
Sally's score can be modeled by 10x+850.
George's score can be modeled by 50x+570.
We can set them equal to each other to see when they intersect.
10x+850=50x+570
40x=280
x=7
If George overtakes her in the 7th week, of course he'll have the higher score in 12 weeks.
 
        
             
        
        
        
Answer:
Cylinder A= 603.81
Cylinder B= 603.19
Cylinder A holds more sand than Cylinder B
Step-by-step explanation:
 
        
             
        
        
        
Answer:
5
Step-by-step explanation:
Square Root - Finding a number that multiplies itself twice into the number within the square root
With this meaning, we need to find a number that multiplies itself into 625.
Finding calculations using exponents will help, 
25^2 is equal to 625. Therefore 
We are not finished, as there is another square root right after, empowering the parenthesis, so what number multiplies itself equals 25?
This would be 5, therefore  is equal to 5.
 is equal to 5.