Law of cosine im so confused theirs calculators online but i keep getting it wrong until i switch numbers around

The system of equations graphed below has how many solutions? y = 2x + 2

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.

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5