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sineoko [7]
3 years ago
10

What’s the sum of 2/5 and 2/4

Mathematics
1 answer:
Mashcka [7]3 years ago
5 0
Find common denominator

5 x 4 = 20

2 x 4 = 8
2 x 5 = 10

8/20 + 10/20 = 18/20

18/20, or 9/10 simplified, is your answer

Hope this helps
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3 years ago
The grandma of a 6-year-old is asking them 2x3 what is 2x3
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2 years ago
Graph y= -2x+7. Help please
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There you go fam, That website is really useful btw, you should use it, if u want ill give you the link, just comment

Step-by-step explanation:

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Write as a single term: cos(2x) cos(x) + sin(2x) sin(x)
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Answer: cos(x)

Step-by-step explanation:

We have  

sin ( x + y ) = sin(x)*cos(y) + cos(x)*sin(y)   (1)   and

cos ( x + y ) = cos(x)*cos(y) - sin(x)*sin(y)  (2)

From eq. (1)

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sin ( x + x ) = sin(x)*cos(x) + cos(x)*sin(x) ⇒ sin(2x) = 2sin(x)cos(x)

From eq. 2

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cos(2x) cos(x) + sin(2x) sin(x)  (3)

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[cos²(x)-sin²(x)]*cos(x) + [(2sen(x)cos(x)]*sin(x)

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since cos²(x) + sin²(x) = 1

8 0
3 years ago
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