The answer is 114. Here’s what I did.
 
        
        
        
Using the Pythagorean Theorem, 
radius^2 = 40^2 + 9^2
radius^2 = 1,600 + 81
radius^2 = 1,681
radius = 41
 
        
        
        
Answer:
y = 9.54
and, x = 0.08
Step-by-step explanation:
Given that
x - 2y = -19 .......................(1)
3x + 5y = 48 ...............(2)
Based on the above information
Multiply by 3 in equation 1
So, 
3x - 6y = -57
3x + 5y = 48
-     -        - 
-11y = -105
y = 9.54
So, the x would be 
x - 2(9.54) = -19
x - 19.08 = -19
x = -19 + 19.08
x = 0.08
 
        
             
        
        
        
Answer:
x=2
Step-by-step explanation:
5(6x-1)-10x+5=4(x+10)-4x
simplify both sides
30x-5-10x+5=4x+40-4x
Simplify even further
20x=40
x=2