Answer:
a. Sam withdraws $11 from his account. That means his account balance reduces by $11 so the integer is -$11. 
He does this 4 times so;
= 4 * -11
= -$44
b. He then deposits $11 once every day for 4 days.
= 4 * 11
= $44
c. The integer for withdrawals is a negative figure to show that the balance was decreasing. The Integer for deposits is positive to show that the balance was increasing. 
 
        
             
        
        
        
200 / 8  =  25
scale factor is 1:25  or 0.04
        
                    
             
        
        
        
Answer:
 (x + 2)(4x - 2).
Step-by-step explanation:
(x+2)(2x+1)+(x+2)(2x-3)
Note that  (x + 2) is common to 2 parts of the expression. So we have:
(x + 2)(2x + 1 + 2x - 3)
= Ix + 2)(4x - 2)
 
        
             
        
        
        
Answer:
5x=2100
x=2100/5
 = 420
Step-by-step explanation: