A hang glider flew to an altitude of 10,000 feet. Fifteen minutes later, its altitude was 7,000 feet. What was the average change in elevation per minute?
The table shows the number of points that each student lost on the first math test. Each question on the test was worth an equal number of points. Christopher answered 6 questions incorrectly. How many questions did Nythia, Raul,Tonya, and Michael answer incorrectly?
Another student answered 9 questions incorrectly. How many points did that student lose?
A display of cereal boxes has one box in the top row, two boxes in the second row, three boxes in the third row, and so on, as shown. How many rows of boxes will there be in a display of 45 boxes?
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