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A computer store sold 1250 desk top computers and 740 laptop computers this year. The number of desktop computers sold has been decreasing by 50 computers each year. The number of laptop computers...

A plant nursery is growing a tree that is 3 ft tall and grows at an average rate of 1 ft per year. Another tree at the nursery is 4 ft tall and grows at an average rate of 0.5 ft per year. After how...

Luis charges \$15 if she cuts grass \$5 more for trimming. Last week she trimmed 5 more yards than she cut. If she made \$415 last week, how many yards did she trim?

Bryan needs to paint a 90 ft by 40 ft rectangular billboard with white paint in order to prepare it for the next advertising theme. Two coats of paint will be needed. Bryan is a contractor, buys his...

An airplane takes 3 hours to travel a distance of  2160 miles with the wind.  The return trip takes 4 hours against the wind.  Find the speed of the plane in still air and the...

A plane traveled 510 mph with the wind and 410 mph against the wind. Find the speed of the plane in still air and the speed of the wind .

An airplane takes 3 hours to travel a distance of 1800 miles with the wind. The return trip takes 5 hours against the wind.  Find the speed of the plane in still air and the speed of the wind...

can someone walk me through this?   suppose the coordinate (a,b) is in q4. describe the location of the following points. (b,a), (2a,-2b), and (-b, -a). explain your reasoning.