Someone please answer these questions. Full workings please

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Y+ 2/y is it a polynomial in one variable or not? and if so, why?