Answer:
140
Step-by-step explanation:
you multiply the amount of people by the amount of floors, 7x20=140
 
        
             
        
        
        
Answer:
5 x 5 = 25
Step-by-step explanation:
C: have a great day
 
        
                    
             
        
        
        
Answer:
f(9) = 8
Step-by-step explanation:
Step 1: Define
f(x) = x - 1
f(9) is x = 9
Step 2: Substitute and Evaluate
f(9) = 9 - 1
f(9) = 8
 
        
             
        
        
        
Answer:
z=3
Step-by-step explanation:
2(2z -4)=4
Divide by 2
2/2(2z -4)=4/2
2z-4 = 2
Add 4 to each side
2z-4+4 = 2+4
2z = 6
Divide by 2
2z/2 = 6/2
z=3