2.2.115
the per capita (per person) income from 1980 to 2010 can be modeled by
f(x) = 2000(x – 1980) + 10,000
where x is the year. determine the year when the per capita income was $18,000.
the per capita income was $18,000 in the year n.

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)