(3 marks) A firm produces two goods in quantities x and y. Its cost function is C(x, y) = 10x +
xy + 10y and the prices Px and Py it can charge are, respectively, P = 50 - x + y and
Py = 50 - x + y. The firm is committed to delivering a total of 15 units. How much
should the firm produce of each good to maximize profits?
(10 marks)​

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

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.