Let f(x) = x2 − 81. find f−1(x). (1 point) ±square root of the quantity x plus 81 9 square root of x 1 over quantity x squared minus 81 x squared over 81

What is the distance between (–2 1/2,-3) and (1, –3)?

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.

Find the value of x for which line a is parallel to line b