Answer:
Step-by-step explanation:
A=1/2(r+2)
2A=f(r+2)
2A/f=r+2
2A/f-2=r
 
        
             
        
        
        
Answer:
i think its 18(DONT TRUST ME)
Step-by-step explanatioN:
6 x 3                 
 
        
             
        
        
        
Graph one: A01- 100 miles
A03 (a)- 50
        
             
        
        
        
Answer:
6 + y
Step-by-step explanation:
Here, we want to write an algebraic expression to represent the situation 
Mathematically, we want to add 6 and y
The algebraic expression will be;
6 + y
 
        
             
        
        
        
Answer:
Amount of Niobium-91 initially
= 300/91 =3.2967mol
2040 years = 3 ×680 = 3 half-lives
therefore, amount left = 0.4121mol
mass of Niobium-91 remaining = 0.4121 ×91 =37.5g
Please give brainliest