Answer:
x ≤ 13
Step-by-step explanation:
-4 + x ≤ 9
-4         -4
x ≤ 13
 
        
             
        
        
        
We calculate the floor area of the kitchen:
 A = (22) * (16)
 A = 352 feet ^ 2
 We consider the following conversion:
 1 foot = 12 inches.
 Applying the conversion we have:
 A = 352 * (12/1) ^ 2
 A = 50688 in ^ 2
 We calculate the area of each tile:
 A = (16) * (16)
 A = 256 in ^ 2
 Then, the number of tiles is given by:
 N = (50688) / (256)
 N = 198
 Answer:
 He needs to buy 198 tiles
        
             
        
        
        
Answer:
9(n + 22) ≤ -15 
Step-by-step explanation:
9 times the sum of a number and 22 is at most −15
Let n = number 
Times = multiplication
Sum = Addition
9 * n + 22 
We must add parenthesis on the end on 22 and before n
We must do this because it says 9 times the sum of a number and 22 which means that 9 is being multiplied by both n and 22 
We would have 9(n + 22) 
9(n + 22) is at most -15
At most meaning that -15 is the highest number that 9(n + 22) can equal
Because it says at most 9(n + 22) can equal -15 or anything less than -15
So at most can be replaced with ≤
9(n + 22) ≤ -15
 
        
             
        
        
        
(s÷t) - r is the correct expression.
        
             
        
        
        
Answer:
75 points
Step-by-step explanation:
45÷60%×100%=75 points in total