Answer:
81(x + 2y)(x - 2y)
Step-by-step explanation:

it would be convenient if you actually give us the equation
theoretical probability is a coin will land on heads 50% of the time
50% of 100 = 50
since it only landed on heads 38 times, this was less than the theoretical probability of 50
The answer is B(1,-2). This is the only point where the two lines intercept. & if you plug the numbers into the equations they fit.
The correct answer is 23/6. Hope this helps.