Given, the ratio of blocks A, B, C,D are in the ratio 4:7:3:1
Let us consider the common ratio to be ‘x’.
So, toy blocks with alphabet A is 4x and
toy blocks with alphabet B is 7x and 
toy blocks with alphabet C is 3x and
toy blocks with alphabet D is x
Again, the number of ‘A’ blocks is 50 more than the number of ‘C’ blocks.
As no. of ‘A’ and ‘C’ blocks are 4x and 3x respectively.
So,
4x=50 + 3x 
x=50
Thus, the number of ‘B’ blocks is 7x = 7(50) = 350
350 is the required number.
        
                    
             
        
        
        
Answer:
y intercept = 5
Step-by-step explanation:
In analytic geometry, using the common convention that the horizontal axis represents a variable x and the vertical axis represents a variable y, a y-intercept or vertical intercept is a point where the graph of a function or relation intersects the y-axis of the coordinate system. As such, these points satisfy x = 0.
 
        
                    
             
        
        
        
Line a and b are perpendicular
        
             
        
        
        
Yes you take 3 times 4 and receive 12 and 5 times 4 and receive 20
        
             
        
        
        
If the y-value is 17, you will see a horizontal line on the graph at, well, the y-value 17. Because the slope is rise over run, and there is only run but not rise, the slope will be 0 over infinity, or simply 0.