B is the answerr okkkkkkk
So you use x = 2.
x-2 = 0
x+7=9
so (0,9) (x,y)
Just add all the numbers together, the divide by the amount of numbers
Given:
The rule of input and output function is:
To find:
The answer if we put 19.
Solution:
Consider the input and output function is:
Substitute 
, we get
Therefore, the required answer is 6.
The walls are vertical so the angle opposite X would be a right angle which is 90 degrees.
X would be 180 - 90 - 35 = 55 degrees
X and 2y - 5 are complementary angles which add together to equal 90:
2y - 5 + 55 = 90
Simplify:
2y +50 = 90
Subtract 50 from both sides:
2y = 40
Divide both sides by 2:
y = 20
