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Rainbow [258]
3 years ago
5

21. Which fractions are NOT equivalent? À3/6=2/4 -B1/8=1/4 C1/3=2/6 D1/4=3/12

Mathematics
1 answer:
ryzh [129]3 years ago
5 0
<h3>Answer: Choice B) 1/8 and 1/4 are not equivalent</h3>

=======================================================

Explanation:

There are two ways to check to see if two fractions are equal.

---------

Method 1) Cross multiplication

3/6 = 2/4

3*4 = 6*2

12 = 12

The last equation is true, so the first equation is true. This shows 3/6 and 2/4 are the same fraction

1/8 = 1/4

1*4 = 8*1

4 = 8

The last equation is false, so 1/8 = 1/4 is false. We found our answer.

1/3 = 2/6

1*6 = 3*2

6 = 6

This equation is true. So we can move on

1/4 = 3/12

1*12 = 4*3

12 = 12

A similar story happens with A and C.

---------

Method 2) Comparing decimal forms

Using a calculator, we can find the decimal form of any fraction

3/6 = 0.5 and 2/4 = 0.5; since we get the same decimal value both times, this means 3/6 = 2/4 is a true statement. Choice A is ruled out.

1/8 = 0.125 and 1/4 = 0.25; we get different decimal values, so we can see that choice B is the answer

1/3 = 0.333.... (the 3s go on forever) and 2/6 = 0.333... we have the same story as choice A, so we can rule out choice C.

1/4 = 0.25 and 3/12 = 0.25, same story as A and C. We can rule out choice D.

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two arcs of concentric circles are intercepted by the same central angle. the resulting arc length of the arc of the larger circ
Bond [772]
the complete question in the attached figure

Let
A°-----------> <span>the same central angle

</span><span>For the larger circle
length of larger circle=2*pi*r-------> 2*pi*12-----> 75.36 m

360</span>°<span> (full circle) has a length of------------> 75.36 m 
 A</span>°-----------------------------------> 16 m
A°=(16)*360/75.36--------> A=76.43°

For the smaller circle
length of smaller circle=2pi*r-------> 2*pi*7.5-----> 47.1 m

360° (full circle) has a length of------------> 47.1 m 
 76.43°-----------------------------------> X
X=76.43*47.1/360-----> X=10 m ----> length arc of the smaller circle

the answer is
the length arc of the smaller circle is 10 m

3 0
2 years ago
What is the interquartile range of this data set 2,5,9,1118,30,42,55,58,73,81
kogti [31]

Answer:

49

Step-by-step explanation:

If so  the inter quartile range = 58 - 9 = 49

5 0
3 years ago
Read 2 more answers
Find the area of the irregular figure.
max2010maxim [7]
Your answer should be 314


4 x 16=64

10 x 25 (25 is the height)=250

64 + 250=314
5 0
3 years ago
What is the volume of the square pyramid with the base edges 24 ft and height
liberstina [14]

Answer:

A

Step-by-step explanation:

The volume of a pyramid is one third the height times the area of the base.

V = ⅓ h A

The base is a square, so the area is the width times length.

V = ⅓ h wl

Problem is, we don't know the height, only the slant length.  But we can use this to find the height.

If we cut a cross section down the middle of the pyramid, we get an isosceles triangle.  The base of the triangle is 24, and the legs are 37.

If we cut this triangle in half, we get two right triangles.  Each right triangle has a base of 12 and a hypotenuse of 37.

Now we can use Pythagorean theorem to find the height of the triangle, which is also the height of the pyramid.

c² = a² + b²

37² = 12² + h²

h = 35

Now we can find the volume.  h = 35, w = 24, and l = 24:

V = ⅓ h wl

V = ⅓ (35) (24) (24)

V = 6720

So the volume is 6720 ft³, or answer A.

8 0
3 years ago
Hahaha I need help again please
attashe74 [19]
It could be 2+1 beacuse it says there are twice as many
5 0
3 years ago
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