Answer:
Explanation:
19.
P = 2(x - 3 + 7x + 1)
= 2(8x - 2) 
= 16x - 4
20. 
P = 3y + 5 + y - 4 + 6y
= 10y + 1
        
                    
             
        
        
        
B represents a function ✔️
        
             
        
        
        
Answer:
$0.45
Step-by-step explanation:
ratio is 2:4:3
total is 9
270 ÷ 9 = 30
smoll 
60 × 0.25 = $15
med 
120 × 0.30 = $36
Big 
91.50 - 15 - 36 = 40.5
40.5 ÷ 90 = $0.45
 
        
             
        
        
        
A simple way to turn this into an equation is by replacing the words with letters: 
1464B = 3/4 S
Then you have to remove the 3/4 from the right side of the equation.  You can do this by dividing both sides by 3/4: 
1464 / 3/4 = S
Then you have to do the sum: 
   1464 
 / 3
= 0488
     488 
     X  4
= 1952
There are 1952 students.