This one you can use the sum of areas of a triangle [A, C, and D (-4, -6)] and a trapezoid [梯形, A, B, E (3, -6), and D (-4, -6)] to minus the area of another triangle [C, B, and E (3, -6)] Area = 1/2 * 2 * 9 + 1/2 * (8 + 9) * 7 - 1/2 * 8 * 9 = 9 + 59.5 - 36 = 32.5
No need to use any slopes or complicated equations what-so-ever.
我想问 AA:9 out of 1000 passengers who traveled on A Airline last year filed a complaint about AA's baggage-handling procedures. Only 1% passengers unhappy with the procedures and most of the passengers were satisfied with the procedures. Thus, AA does not need to rewiew the procedures in maintaining passengers.(领会精神) 这个怎么个思路呀?
我想问 AA:9 out of 1000 passengers who traveled on A Airline last year filed a complaint about AA's baggage-handling procedures. Only 1% passengers unhappy with the procedures and most of the passengers were satisfied with the procedures. Thus, AA does not need to rewiew the procedures in maintaining passengers.(领会精神) 这个怎么个思路呀?