What is the set of months with only 28 days in roster form?

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

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"