(f.g)(x) = (4x + 6)(-5x) = -20x^2 -30x
ok done. Thank to me :>
 
        
             
        
        
        
Let's assume 
 the number of hours Susan jogs at the increased speed is 't' hours 
Since, increased speed is 6 miles per hour
after 't' hours , she travles with increased speed is 6*t miles
She starts off with a half-hour walk at a pace of 2 miles per hour
so, she travels distance 
=0.5*2 miles
=1 miles
She travels a total of 4 miles
total distance is 
=6t+1
now, we can set them equal 

now, we can solve for t
Subtract both sides by 1 


Divide both sides by 6 
we get 

so, the number of hours Susan jogs at the increased speed is 0.5 hrs.........Answer
 
        
             
        
        
        
40/50
80 divided by 2
100 divided by 2
        
             
        
        
        
A^2 + b^2 = c^2
18^2 + 26^2 = c^2
324 + 676 = c^2
1000 = c^2
sqrt 1000 = c
31.62 = c