1) 4, because 4/5 is closer to 4 than it is 3 1/2. 
2) 100
3) 5
        
             
        
        
        
Here are three ratios 
1 6/7 
2 120/140
3 60/70
        
             
        
        
        
Answer:
Either y =
 or, y =
 
Step-by-step explanation:
We have to solve the following quadratic equation  
45y² + 15y - 10 =0
Now, dividing both sides with 5 we get, 9y² + 3y -2 =0
Hence, to solve the above equation we have to factorize the left-hand part of the equation.
So, 9y² + 3y - 2 =0
⇒ 9y² +6y -3y -2 =0
⇒ (3y +2) (3y -1 ) =0
⇒ Either (3y +2) =0 or (3y -1) =0
⇒ Either y =
 or, y =
 (Answer)
 
        
             
        
        
        
Answer:
84 blocks.
Step-by-step explanation:
If you are adding 2 to each day (which already has 4) in a 2 week period (14 days) than you would have to time 2(14) and 4(14) and add them. Thus would make the answer 84 blocks.