Mathematics, 30.10.2020 22:10, luffybunny

Use order of operations to check your 5 = 28 74

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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?

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Mathematics, 21.06.2019 19:30, mya1318

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?

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Mathematics, 21.06.2019 22:00, Jasten

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

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Mathematics, 22.06.2019 01:00, mike2614

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

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Use order of operations to check your 5 = 28 74...