The answer is 9
sqrt(49) = 7
4^2 = 16
16-7 = 9
X= 50
Replace the x with the given number.
Y= 50-20
Y= 30
Answer:


Step-by-step explanation:
Solving (47):
To solve for B, we have:
--- sum of angles in a triangle
This gives

Collect like terms


Solving (48):
To solve for Y, we have:
--- sum of angles in a triangle
This gives

Where
-- angle on a straight line
Solve for X


So, we have:


