Answer:
the first function is correct
 
        
             
        
        
        
Step-by-step explanation:
Cost = $112 
30% discount coupon on the item he's going to buy
=$112 × 30/100 (or you can write 30%) 
=$168/5 ($33.6)
7% tax on the item=$112 × 7/100(or you can write 7%)
 = $196/25 ($7.84)
Total amount altogether=$112 - $33.6 - $7.84
 =$70.56 
not sure for the answer^^
 
        
             
        
        
        
4Answer:
exact form:

decimal form:
4.2
mixed number form:
4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
The time  in seconds, required for an object accelerating at a constant rate of a meters/second to travel a distance of d meters is given by this  equation.
t = va
We need to find the expression for d in terms of t and a.
As velocity = distance/time

So, the distance d is  .
.