A2+a10 = 54 a7-a1=30 a1=? d=?

Arrange these numbers from least to greatest 3/5 5/7 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?

If 3x+8=3x+8 is it one solution or no solution