What is the answer to 12 plus -7?

Quiz understanding the big picture 1750 to the present? What is the area of Lough Sheelin? How many degrees rotational symmery does an rectangle have? Why was chapstick invented? What is quarter inch? Why do you need to study number system in math? What is 0.4125 as a fraction? What is 0.790 as a fraction? How do you find the magnitude of an integer? How many gallons equal a gram? What does it mean when a quarter falls out of your pocket? Roman Numerals XIIC? What three consecutive numbers add up to 72? How many miles a day did columbus' ships go? What are the solutions to x2 plus xy plus y2 equals 7 and 2x plus y equals 1 shown by completing the square? What is 7 x 13 x 30? Which of the numbers 2 3 4 5 6 8 9 12 15 17 19 are factors of 38? What is the mean of the combined data sets if the mean of a data set of 6 is 8 and the mean of a different data set of 6 numbers is 20? What is median in algebra? How can you use division to convert a fraction into a decimal?