Can numbers 5,9,12 form an right
triangle?

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.

Qrst is a parallelogram. determine the measure of ∠q pls

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)