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CaHeK987 [17]
3 years ago
11

From the graph; calculate: E=

Mathematics
1 answer:
Ket [755]3 years ago
5 0
<h3>Answer:</h3>

c) 7π cm

<h3>Step-by-step explanation:</h3>

The length of an arc (s) is related to its central angle (θ) and the radius of the circle (r) by ...

... s = rθ . . . . . . . . . θ in radians

Here, the central angle measures are given in "grads". There are 400 grads in a circle, so 200 grads in π radians. To convert grads to radians, we multiply the number of grads by π/(200g).

Then the lengths of the arcs are ...

... arc AB = (20 cm)·(50g·(π/(200g))) = 5π cm

... arc BC = (10 cm)·(40g·(π/(200g))) = 2π cm

E = arc AB + arc BC = 5π cm + 2π cm = 7π cm

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First you must find a common denominator. In this case 10 will work. You then multiply the top number by whatever you multiplied the bottom number by. This is shown below:
4/5- 3/10 = 8/10- 3/10 
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Greetings, I Am BrotherEye

Answer:

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Science notation is a good way to write what kinds of numbers? Select more then one answer
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Write and equation of the translated or rotated graph in general form (picture below)
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The answer is hyperbola; (x')² - (y')² - 16 = 0 ⇒ answer (a)

Step-by-step explanation:

* At first lets talk about the general form of the conic equation

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∵ B² - 4AC < 0 , if a conic exists, it will be either a circle or an ellipse.

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∵ B² - 4AC > 0 , if a conic exists, it will be a hyperbola.

* Now we will study our equation:

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∴ B² - 4 AC = (1)² - 4(0)(0) = 1 > 0

∴ B² - 4AC > 0

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* The equation xy = -8

∵ We have term xy that means we rotated the graph about

  the origin by angle Ф

∵ Ф = π/4

∴ We rotated the x-axis and the y-axis by angle π/4

* That means the point (x' , y') it was point (x , y)

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* Lets open the bracket

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* Lets add the like terms

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- The blue line is y'

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