Define x @ y as (x3 − y)/x, for distinct positive integers x and y. What is the value of 5 @ 10? Evaluating 5 @ 10 yields (53 − 10)/5 = (125 − 10)/5 = 115/5 = 23. Define a # b as a2 − b2 − ab, for...
Final exams often accompany the final days of school. Sherry has had four tests so far in her science class, each worth 1/6 of her final grade. She scored 87%, 89%, 92% and 91% on these tests. Her...
Original Handbook Problem: Vacations R-Us charges $130 a day plus a one-time, nonrefundable $50 cleaning fee to rent a house at the beach. How much will it cost the Sanchez family to rent the house...
Semi-Finalist Video in the 2011-2012 Math Video Challenge. This video was created by The Eagles. The Math Video Challenge is an innovative program involving teams of students using cutting-edge...
Finalist Video in the 2011-2012 Math Video Challenge. This video was created by team Mary Help of Christians. The Math Video Challenge is an innovative program involving teams of students using...
An important formula to know, the difference of squares identity is derived geometrically in the video for this practice plan. Mathletes will then try to recognize the difference of squares structure...