Define variables and write systems of equations for the situation. solve using substitution. suppose you are thinking about buying one of two cars. car a will cost $17,655. you can expect to pay an average of $1230 per year for fuel, maintenance and repairs. car b will cost about $15,900. fuel maintenance and repairs for it will average about $1425 per year. after how many years are the total costs for the cars the same?

Lauer corporation uses the periodic inventory system and has provided the following information about one of its laptop computers: date transaction number of units cost per unit 1/1 beginning inventory 210 $ 910 5/5 purchase 310 $ 1,010 8/10 purchase 410 $ 1,110 10/15 purchase 255 $ 1,160 during the year, lauer sold 1,025 laptop computers. what was cost of goods sold using the lifo cost flow assumption?

Experienced problem solvers always consider both the value and units of their answer to a problem. why?

Label each of the following statements true, false, or uncertain. explain your choice carefully. a. workers benefit equally from the process of creative destruction. b. in the past two decades, the real wages of low-skill u.s. workers have declined relative to the real wages of high-skill workers. c. technological progress leads to a decrease in employment if, and only if, the increase in output is smaller than the increase in productivity. d. the apparent decrease in the natural rate of unemployment in the united states in the second-half of the 1990s can be explained by the fact that productivity growth was unexpectedly high during that period.