What group of people were the first to formalize addition? Help
Answer the following sums. Once you have completed each question, put your answers in order from smallest to largest it will join together to give you the answer you seek.

C: 6 + (-10) E: -12 + 19 E: -3 + (-4) E: 36 + (-18) H: (-7) + (-8)

H: -8 + 6 I: 9 + (-9) N: (-6) + 10 S: 16 + (-1) T: (-9) + (-9)

Abbey purchased a house using a fixed rate mortgage. the annual interest rate is 4.2% compounded monthly for 20 years. the mortgage amount is $235,000. what is the monthly payment on the mortgage? this isn't a multiple choice question have to show my work

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer