What is the result of subtracting the second equation from the first? \begin{aligned} -4x-2y &= -2 x-2y &= 9 \end{aligned}
−4x−2y
x−2y


=−2
=9

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

How do you find the area of a triangle

Can you me find the missing length. i attached an image.