Mathematics, 17.01.2020 00:31, kierafisher05
Anjali’s school is selling tickets to the annual dance competition on the first day of ticket sales the school sold 6 adult tickets and 8 student tickets for a total of $130 the school took in $90 on the second day by selling 2 adult tickets and 12 student tickets find the price of an adult ticket and the price of a student ticket
Answers: 1
Mathematics, 20.06.2019 18:04, Uc34758
Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?
Answers: 2
Anjali’s school is selling tickets to the annual dance competition on the first day of ticket sales...
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