What is the absolute value of a number

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.

What is the ratio of the length of an object in yards to the length of the same object in miles?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20