Answer:
  are zeroes of given quadratic equation.
  are zeroes of given quadratic equation.
Step-by-step explanation:
We have been a quadratic equation: 

We need to find the zeroes of quadratic equation
We have a formula to find zeroes of a quadratic equation:

General form of quadratic equation is 
On comparing general equation with b given equation we get
a=2,b=-10,c=-3
On substituting the values in formula we get


Now substituting D in   we get
 we get




Therefore, 
 
        
                    
             
        
        
        
Answer:
C
Step-by-step explanation:
We know every triangle equals 180 so were just going to take 180 - 42 = 138 then were going to do 138 - 67 = 71  we can check our work by doing 
42 + 67+ 71 = 180. We also know 67 + 42 = 109.
Lets look at our answers;
A. 109 = 180 + x  When solved it gave me; x = -71. We got a positive 71 so this is incorrect. 
B. x + 42 = 67   When solved it gave me;  x = 25, which is incorrect. 
C. x = 180 - 109 When solved it gave me; x = 71 
D. 42 + 67 - x = 180 When solved it gave me; x =  - 71 
Therefore the answer is C.
 
        
             
        
        
        
-3 because you could eliminate the 3x by subtracting it by 3x
        
             
        
        
        
Answer:
-35/9
Step-by-step explanation:
(3^-2)-4
1/9-4
-35/9
 
        
             
        
        
        
352.7916667 or in another way 352.79