The function ​f(x, y)=3x+3y has an absolute maximum value and absolute minimum value subject to the constraint 9x^2-9xy-9y^2=9 . Use Lagrange multipliers to find these values.

Pls , the question is in the picture!

What could explain what happened when the time was equal to 120 minutes

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 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 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.