350 rounded to the nearest hundred is

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

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.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?