Answer:
g(f): x -> 2(x-7)=2x-14 , g(f)(-1)=2*(-1)-14=-16
Step-by-step explanation:
 
        
                    
             
        
        
        
You multiply vectors and scalar simply by multiplying each component by that scalar:

Finally, you sum two vectors by summing the correspondent coordinates:

 
        
             
        
        
        
Answer:
0.97
Step-by-step explanation:
You only have to divide 4.85 by 5 and you will get the unit price.✨ Trust me I get it right!
 
        
             
        
        
        
Answer:
Length = 49.5 unit and width = 49.5 unit 
Step-by-step explanation:
Given as , Perimeter of rectangle = 198 unit
so ,as Perimeter of rectangle = 2× ( Length + width)
Or,                                   198 = 2 ×  (Length + width)
Or,                                    = length + width
 = length + width
So, length + width = 99 unit
Now to make area maximum
Length × width = maximum 
Or, (99 - width ) × width = maximum 
       99 Width - width² = maximum                               Let width = W
Now differentiate both side with respect to W
D(99W - W²) = 0         as, constant diff is 0
 = 0         as, constant diff is 0
So, 99 - 2w = 0
Or, w = 
Or, w = 49.5 unit    and L = 99- 4905 = 49.5 unit      Answer