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tatyana61 [14]
2 years ago
11

Three fifths of the sum of thirteen and six ​

Mathematics
1 answer:
professor190 [17]2 years ago
6 0

Answer:

11.4

Step-by-step explanation:

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D) 9 postcards with 2 shells each.

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What in slope-intercept form, can go through the line ( a, 2a) and (-5a, 6a)
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Answer:

  • y = -2/3x + 8/3a

Step-by-step explanation:

<u>Given points</u>

  • (a, 2a) and (-5a, 6a)

<u>Slope-intercept form</u>

  • y = mx + b

<u>Slope of the line is</u>

  • m = (6a - 2a)/( -5a - a) = 4a/(-6a) = - 2/3

<u>The y-intercept is:</u>

  • 2a = -2/3*a + b
  • b = 2a + 2/3a
  • b= 8/3a

<u>So the line is:</u>

  • y = -2/3x + 8/3a

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3 years ago
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Multiplying a number by 3 is equal to sum of the number and 5.
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Answer:

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Step-by-step explanation:

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2 years ago
Count the left handed and right handed spirals on the cacti in the photograph you should get two consecutive terms of the Fibona
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You can count the spirals because they are coloured.

The left handed spirals are in red and you can count 13.

The rifht hanged spirals are in yellow and you can count 21.

Fibonacci sequence is: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... From 2 the next number is the sum of the two previous numbers:

2 = 1 + 1

3 = 2 + 1

5 = 3 + 2

8 = 5 + 3

13 = 8 + 5

21 = 13 + 8.

Fibonacci numbers are found in many structures in nature.

We have just found that these cacti enclose Fibonacci numbers 13 and 21.

Answer: 13 and 21
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