Step-by-step explanation:

 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: 6x + $2= $21.50
Step-by-step explanation:
To make an equation first we are going to give the cost of each taco the variable x since we don't know what it is. Then we will combine 6 multiplied by x to get 6x and add it to $2 to get $21.50 so the equation will be 6x + $2= $21.50. First we subtract 2 from both sides of the equation which makes the equation become 6x= $19.50. Then we divide both sides of the equation by 6 and get x=$3.25. This means that each taco cost $3.25.
 
        
             
        
        
        
Answer: Option D
phase
Step-by-step explanation:
By definition, the cosine function has the following form

Where  is known as the phase angle
 is known as the phase angle
By definition the sinx function is equal to the cosx function with a phase shift of 
So if we have the function
 and we want to transform it into the function
 and we want to transform it into the function  then
 then 
Finally
 
 
the answer is the option D