If f(x)=-2x+9 find f(a+3)

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x, y) ?

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83