Answer:
6y + 42
Step-by-step explanation:
 
        
                    
             
        
        
        
Line 3 
since he added which is against the order of opreation rule he was supposed to multiply first then add 
again what he was supposed to do is 
Line 2:21+5+6(2)
Line 3:21+5+12
        
             
        
        
        
Answer:
You can save 0.40 if you choose to buy the 16-ounce bottles instead of 10-ounce bottles.
0.56x5=2.8 
0.40x8=3.2 
3.2-2.8= 0.40
 
        
             
        
        
        
Keisha is correct, because as per the definition <u>A function is a special relationship where each input has a single output</u>. 
A function is a special relation. In other words, a relation if and only if it has a specific characteristic where each input has a single output, then it is called a Function. 
All functions are relations but not all relations are functions.
 
        
             
        
        
        
Answer:
When f(x) = 7, x is equal to 5. 
Step-by-step explanation:
When looking at this graph, we are looking for where the line hits a point where y is equal to 7. That's because f(x) is essentially the same thing as y. 
The point in which the graph hits y = 7 is (5, 7). This means the x value we need is 5.