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pav-90 [236]
3 years ago
12

Is this concave or convex or neither? (am I right?)

Mathematics
1 answer:
faltersainse [42]3 years ago
6 0
Concave polygon it is hollowed our
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Find the slope of the line: y = (207 - 317 - 320)<br> PLEASE ANSWER
Dmitry [639]
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A car is moving at a rate of 35 miles per hour, and the diameter of its wheels is 2.5 feet. (Round 1 decimal place).
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Solve using the distributive property of whole numbers. <br> 27,345 x 113 x-27,345 x 13​
rewona [7]

Answer:

2,734,500

Step-by-step explanation:

27,345 × 113 - 27,345 × 13 ← factor out 27,345 from each term

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2 years ago
Prove that, in a right triangle with a 15° angle, the altitude to the hypotenuse is one fourth of the hypotenuse.
igomit [66]

Consider the attached figure. If AB has length 1, then BC has length sin(15°) and CD (the altitude of triangle ABC) has length sin(15°)·cos(15°).

By the double angle formula for sin(α), ...

... sin(2α) = 2sin(α)cos(α)

Rearranging, this gives

... sin(α)·cos(α) = sin(2α)/2

We have

... CD = sin(15°)·cos(15°) = sin(2·15°)/2

... CD = sin(30°)/2 = (1/2)/2 = 1/4

That is, the altitude, CD, is 1/4 the hypotenuse, AB, of triangle ABC.

3 0
3 years ago
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