Xy = 72
x - y = 1
x = 1 + y
(1+y)y = 72
y + y^2 = 72
y^2 + y - 72 = 0
(y-8)(y+9) = 0
y = 8 , y = - 9
x = 1 + 8
x = 9
y = 8
i am a mathematics teacher. if anything to ask please pm me
The answer to that one would be D.
The answer is y>2x+2 and y<x+1; (-3, 1)
I think what you're looking for is the Commutative Property which is generally a + b = b + a or (like in this situation) m = n equals to n = m. I hope that's what you meant :)
Answer:
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