So the answers are :
A: 5 seconds 
and 
B: 10 seconds 
        
                    
             
        
        
        
Answer:
x=−2−√5 or x=−2+√5
Step-by-step explanation:
-5x2 - 20x + 35 = 30
Answer = x=−2−√5 or x=−2+√5
 
        
             
        
        
        
Answer:
There is no solution to this answer. 
Step-by-step explanation:
Leah's rate is 10x 
Jason's rate is 20x
If you solve for 20x=10x, you get no solution. They are parallel lines. 
 
        
             
        
        
        
Answer : The given polynomial equation can have 0,2 or 4 complex roots.
Explanation:-
Given polynomial equation is  which is a polynomial of degree 5.
 which is a polynomial of degree 5.
We know that the complex roots always occur in pair ,therefore the number of complex roots in any polynomial must be an even number but less than equal  to the degree of polynomial.
Thus, the given polynomial equation has 4 complex roots.
  
        
                    
             
        
        
        
Answer:
m + m = 36
18 + 18 = 36
Step-by-step explanation: