Answer:
<em>5(4) - 6 + 5(4) - 6</em>
Step-by-step explanation:
k(x) = 5x - 6
(k+k)(x) = 5x - 6 + 5x - 6
(k+k)(4) = 5(4) - 6 + 5(4) - 6
=> Option D is correct
Hope this helps!
 
        
             
        
        
        
X = number of correct answers
Y = number of incorrect answers
School A has 174 points and school B has 102 points.
A = 174
B = 102
School A has the same number of correct and incorrect answers during the final round. 
A = 174 + 10X - 6Y
School B gives no incorrect answers and the same number of correct answers as school A.
B = 102 + 10X
The contest ends with the two schools tied.
Score = 174 + 10X - 6Y = 102 + 10X
174 + 10X - 6Y = 102 + 10X
 
        
             
        
        
        
Cos^4(x) = 
(cos²x)² = 
(1-sen²x)² = 
1² - 2*1*sen²x + sen^4x = 
1 - 2sen²x + sen^4x
        
             
        
        
        
I chose x^3, it would be a cubic function , then it’s -(x-6 )^3 -2