Which of the following represents the set in words?
{x | x > 0}

Write two subtraction equations that are equivalent to 5 + 12 = 17.

What is the number 321,000,000 in scientific notation? also what is the 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.