M What is the inverse of the function f(x) = 20 - 64x that exists over a restricted domain?

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

3/4 = c/36 i need with this fraction proble.

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