Helppp, and when you answer please explain how you got it so i can hopefully understand it next time

2÷6+1/2 to the second power plus one

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?