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3 years ago

Pls help me no one helps me

Mathematics

2 answers:

Anettt [7]3 years ago

7 0

Answer:

2/45

Step-by-step explanation:

Jlenok [28]3 years ago

5 0

2/45 I think let’s hope I’m not wrong

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A circle with circumference 20 has an arc with 72 degree central angle what is length of the arc

Debora [2.8K]

Answer:

Step-by-step explanation:

Look at the picture.

At the beginning we have to calculate what part of the angle 360° is the given angle 75°.

$\dfrac{75}{360}=75:360=0.2$

The same part of the circumference of the circle is the arc defined by this central angle.

The circumference C = 20.

Therefore

$x=0.2\cdot20=4$

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Add 3 to both sides so that the equation becomes 2x^2 + 7x - 6 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
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                              x = [ -7 ± √(7^2 - 4(2)(-6)) ] / ( 2(2) )
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                              x = [ -7 ± sqrt(97) ] / ( 4 )
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The answers are -7/4 + sqrt(97)/4 and -7/4 - sqrt(97)/4.

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3 years ago

P is the set of natural numbers that are less than 12

Damm [24]

Answer:

{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }

Step-by-step explanation:

As per the definition, a natural number is a counting number (non-fractional number) that is greater than zero, but not equal to zero.

A set of natural numbers below 12 (but not including 12, because such isn't specified) would henceforth be;

{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }

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