Answer:
D
Step-by-step explanation:
Since they are the same variables
 
        
             
        
        
        
Answer:
x = 12
Step-by-step explanation:
The diagram shows an equilateral triangle (because all angles are congruent). All sides in equilateral triangle are congruent, so

Solve the equation

Check this value:

Thus, 
 
        
             
        
        
        
Answer:
12 
Step-by-step explanation:
She has 15 feet of floss. 15/1.25 is 12.
Hope this helps!!
 
        
                    
             
        
        
        
To evaluate this function, we use the calculator. We change the setting to radian first because we are using pi and thensimply input the cosine of 7 pi over 8. Then we square the answer. <span>We expect this number to be less than 1. </span>The function value is 0.8536.