Which statement about Triangle XYZ is true?
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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.

Which inequality has a dashed boundary line when graphed ?

I'm confused on this could anyone me and show me what i need to do to solve it.