Answer:f(4)=−3x−1 f ( 4 ) = - 3 x - 1. 
Step-by-step explanation:ff(4)=−3x−1 f ( 4 ) = - 3 x - 1. 
f(4)=−3x−1 f ( 4 ) = - 3 x - 1. Replace the variable x x with 4 4 in the expression. f(4)=−3⋅4−1 f ( 4 ) = - 3 ⋅ 4 - 1. Simplify the result.
 
        
             
        
        
        
A circle is 360°.
Add the known angle measures and subtract the total from 360°.
115+105+60 =280°
360 - 280 = 80°
X= 80°
 
        
             
        
        
        
Answer:
133.33%
Step-by-step explanation:
120= 120/90
the word OF = multiplication
120/90 x 100/100=133.33/100
133.33/100=133.33%
 
        
             
        
        
        
Move the negative sign to the left
-x/5 = -20
Multiply both sides by 5
-x = -20 × 5
Simplify 20 × 5 to 100
-x = -100
Multiply both sides by -1
<em>x = 100</em>
<u>C. 100</u>
 
        
                    
             
        
        
        
9 students
30% ends up being .3%, multiply .3% by 30 students which equals 9.