Mathematics, 04.08.2019 15:00 zay65307
Helena asked five drama club members in her homeroom how many tickets they had sold. the mean number of tickets sold was 16. then she took ten random samples from the entire drama club of 75 students. the mean number of tickets sold was 22.5. compare the means. is one sample a better representation?
Answers: 2
Mathematics, 20.06.2019 18:04
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
Mathematics, 21.06.2019 18:30
Iam a rectangle. my perimeter is 60 feet. how much are do i cover?
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Mathematics, 21.06.2019 19:00
What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2
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Mathematics, 21.06.2019 22:00
Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?
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Helena asked five drama club members in her homeroom how many tickets they had sold. the mean number...
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