Complementary and adjacent
        
             
        
        
        
-x+3x=2x
2x=2+6
2x=8
8/2=4
x=4
        
                    
             
        
        
        
Answer:
-0.48
Step-by-step explanation:
(-1.2)(0.4)
= - 0.48
 
        
             
        
        
        
Answer:
2.5 %  
Step-by-step explanation:
The simple interest formula is
I = Prt
Data:
 I = $75
P = $600
 t = 5 yr
Calculation:
75 = 600 × r × 5
75 = 3000 r
Divide each side by 3000
r = 75/3000 = 0.025 = 2.5 % APR
The annual percentage rate is 2.5 %.