Answer:
chemical formula for silver sulfate Ag2SO4
The top right one is the answer. I hope this helps
When X= 2 , Y =23 the z has the value of 9.3913.
Complete the square:
<em>x</em> ^2 - 2<em>x</em> + <em>y</em> ^2 + 4<em>y</em> + 1 = 0
(<em>x</em> - 1)^2 + (<em>y</em> + 2)^2 + 1 = 1 + 4
(<em>x</em> - 1)^2 + (<em>y</em> + 2)^2 = 4 = 2^2
Hence the center is (1, -2) and the radius is 2. (D)
I think It should be "Variable".
