What is the best solution of the system of equations? y= 3x-4 -3y= -9x +12
a) no solution
b) (4,8)
c) infinitely many solutions
d) (2,-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.