They are on opposite sides of zero because one number is negative and one is positive
The most exact answer would be 0.19951% but the approximate answer would be 0.2%.
Easily, you write the inverse of it without a minus
so if you were to find x^(-2) it would be (1/x)^2
The rest is all the same
(2x-1)×4=8x-4
I hope it helps ;)
P - q i believe because
p = total average
q = average of ac
x = average of bd
p - q = x