xy = x ÷x y = 1
xy + y = z xy = z - y (xy)/y = (z - y)/y x = (z - y)/y
x+xy=8 xy=-x+8 y=-1+8/x
It is XY^2 or X*Y*Y
"xy" refers to the product of "x" and "y". Just substitute the variables for numbers, and do the multiplication.
So far you know that: x=-8 xy=1 so xy means x times y. If you split xy. y=1/x or y=1/-8 1/-8= -0.125 You can find out that this is correct with the formula xy=1 because -0.125 x -8 is 1.
18
k = x y x = k/y
If Y = 0 then there is no value of X such that XY = 1.
It equals XY.
It equals y+1
Inverse proportion implies xy = c where c is the constant of [inverse] proportionality. x = 2 and y = 36 implies xy = 72 = c So the relationship is xy = 72 Then, if x = 4, y = 72/x = 72/4 = 18