Problem solving strategy

categories

drawing a picture
making a table
working backwards
looking for a pattern

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

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.

We just started the introduction into circles and i have no idea how to do this.