Angles of a triangle worksheet I got most of it but still confused on the rest… anyone got answers ASAP!

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).