What are the solutions of 12 – x2 = 0?

x = 2 StartRoot 3 EndRoot and x = Negative 2 StartRoot 3 EndRoot
x = 3 StartRoot 2 EndRoot and x = Negative 3 StartRoot 2 EndRoot
x = 4 StartRoot 3 EndRoot and x = Negative 4 StartRoot 3 EndRoot
x = 6 and x = –6

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

What is best way to getting answer for my exam is

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.