Step-by-step explanation:
1.Given .
2.Being vertically opposite angle.
3.Because sum of all interior angle of a triangle is always 180°.
4.From the statement of 3 number.
5.Because angle 4 = angle 3 and angle 6= angle 1 .
6.(suppose ,< is angle sign) solving this equation,
 m<1 + m<2+ m<3 = m<3 + m<5 + m<1
 
        
             
        
        
        
Answer:
66 ft.
Step-by-step explanation:
Add 9+9+9+9+30 and that equals 66.
 
        
                    
             
        
        
        
Answer:
 3
Step-by-step explanation:
m= y2 - y1/ x2 - x 1
(6, 7) (4, 1)
1-7= -6
4-6= -2 
-6/-2 = 3
 
        
             
        
        
        
Answer:  
Step-by-step explanation:
We know that the general form of the exponential decay formula is
  , where y is final amount remaining after t time, A is the original amount and r is the rate of decay
, where y is final amount remaining after t time, A is the original amount and r is the rate of decay
Now, the ratio of strontium-90 remaining, p , as a function of years, t , since the nuclear accident. 
Hence, the ratio of remaining since the nuclear accident is 
 
        
                    
             
        
        
        
Answer:
13, 17, 19, and 23 
Step-by-step explanation:
13+17+19+23=72