What property is being used for 8x-2+x-14 and 9(4m+1) and lastly 3(-2x+7) i already know the answers for those, i just need with the question that says "what property is being used for those problems"

Plz hurry evaluate the expression a+b where a=8 and b=19

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?

Tom and lilly rented a house for $12,000 last year. at the start of the year they bought the house they had been renting directly from the owner for $250,000. they believe they could rent it for $12,000 this year, but stay in the house. how much does tom and lilly’s decision to buy the house change gdp? a. it reduces gdp by $12,000 b. it does not change gdp c. it raises gdp by $238,000 d. it raises gdp by $250,000