Answer: 
Step-by-step explanation:
Given
Azmyne decided to study a total of 
She spent 
 on Friday and  
 on Saturday
Hours spent on Friday
 
Hours spent on Saturday 

She must study for 

 
        
             
        
        
        
You need use your strategies multiplie it than simplify to k and than move it to E tens
        
             
        
        
        
Answer:
x= -14
Step-by-step explanation:
 
        
                    
             
        
        
        
Area of rectangular post card = length x width
For the given post card: 
length = 4 in
width = (3+b) in
area = 24 in^2
So, substituting in the equation of the area:
24 = 4 x (3+b)
24 = 12 + 4b
24 - 12 = 4b
12 = 4b
b = 3 in
Therefore:
the length of the postcard = 4 inch
the width of the postcard = b+3 = 3 + 3 = 6 inch