Answer:
let me think
Step-by-step explanation:
i want free points
 
        
             
        
        
        
Answer:
Answers below
Step-by-step explanation:
1)  4 (x+4)
2) 4x + 16
3) 2x+8
4) 2x+8
5) 3x+9
 
        
                    
             
        
        
        
Answer:
x1=4
x2=8
Step-by-step explanation:
1- Factor the equation.
2- solve a  Single Variable Equation
3- Parabola, Finding the Vertex
 
        
             
        
        
        
Answer:
8 minutes
Step-by-step explanation:
Speed or Rate = Distance / time
Distance = Speed × time
Nicholas's sand castle is 30 cm tall and he is adding sand at a rate of 12 cm per minute.
Nicholas = Nina
30cm + (12cm/min)x
= 30 + 12x
Nina's sand castle is 78 cm tall and she is adding more sand to it at a rate of 6 cm per minute. 
78cm + (6cm/min)x
78 + 6x
30 + 12x = 78 + 6x
12x - 6x = 78 - 30
6x = 48
x = 48/6
x = 8 minutes
Therefore, after 8 minutes, Nina and Nicholas's sand castles be the same height.
 
        
             
        
        
        
Using the rules of logarithms, you can change it to 
ln( ) + ln(
) + ln( ) =
) = 
ln(27 )
)
This is because when you have a factor in front of a logarithm, that turns into an exponent, and when you add logarithms, you multiply the factors inside of the logarithm.  
So your final answer is 
D.