The perimeter of a rectangle is 126cm. The rectangle is twice as long as it is wide. What are the dimensions?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

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?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper