Alvita is planning a garden patio to be made from idebtical square paving stones laid out in a rectangle measuring x stones by y stones. she finds that when she adds a border of width one stone aroudnthe patio, the area of the border is equal to the original area of the patio. how many possible values of x are there?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.