Find the constant of variation k for the inverse variation. then write an equation for the inverse variation.
y = 5 when x = 7.5

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

Find the domain and range of the following function f(x) = 51x - 21+ 4

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.