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A train travels 150 miles at a speed of 50 mph, then 200 miles at 80 mph. What is the average speed of the entire trip?
A company sells a product for $120. If the cost to produce it is $75 and they sell 400 units, what is the total profit?
The sum of two consecutive even integers is 74. What is their product?
A car depreciates 20% per year. If it costs $25,000 now, what will it be worth after 3 years?
The ratio of boys to girls in a class is 3:5. If there are 40 students total, how many more girls than boys are there?
#### 78.51. A train travels from City A to City B, a distance of 300 miles, at an average speed of 60 miles per hour. It returns from City B to City A at an average speed of 40 miles per hour. What is the average speed for the entire trip?
Total time for the round trip = 5 hours + 7.5 hours = 12.5 hours
Total distance for the round trip = 300 miles + 300 miles = 600 miles
A rectangular garden has a length that is 4 meters more than twice its width. If the perimeter of the garden is 64 meters, what are the dimensions of the garden?
Perimeter of the rectangle = 2(length + width) = 64 meters