Positive whole numbers less than 8

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

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.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?