X²+5x+6, x²+x-6 and x²-9 find hcf

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

The constitution gives congress the power to create federal courts lower than the supreme court higher than the supreme court equal to the supreme court, unaffected by the supreme court.