Answer:
23
Step-by-step explanation:
(36-5)-4x2
31-4x2
31-8
23

The Correct choice is <u>Substition method</u> , as we can directly substitute the value of y from first equation to the second equation.
25 = 5*5
405 = 81*5
therefore, 25/405 = (5*5)/(81*5)=5/81
The answer is B because a linear function is y=mx+b