In a class full of men and women 2/5 of the class are women what is the ratio of men and women in its simplest form

What is the inverse of the function f(x) = 2x + 1?

Me because some of question i don’t understand

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.