Answer:
c
Step-by-step explanation:
i dont really have an explanation but i got it right
 
        
             
        
        
        
Answer:
5 hours
Step-by-step explanation:
227.5+97.5=325
325/65=5
 
        
             
        
        
        
Hey, I’m pretty sure the answer is y=1/2x + 0. 
To explain, we can plug the x value into the equation for all of the x values, and we will get our y value. 
So the first one, 
y=1/2(1) + 0 —> 1/2
The second one, 
y=1/2(2) + 0 —> 1 
And so forth, the rest of the equations will be correct. I hope that helps ! :D
        
             
        
        
        
1) an = a1 + d*(n-1) => a20 = -4 + (-9)*19 = -4 - 171 = - 175
1) ---> C)
2) a81 = 20 + 4*80 = 340;
2) ---> A)
3) a12 = ?
3) ---> B) or D).