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Viktor [21]
2 years ago
7

Please show work ill mark the brainlest

Mathematics
2 answers:
Reil [10]2 years ago
6 0

Answer: D

Closed circle mean it would be an “equal to.” Since the line is going to the left of 7 it means x is less than 7.

Darina [25.2K]2 years ago
5 0

Answer:

D

Step-by-step explanation:

The circle is filled in and the numbers are going lower so x is less than or equal to 7. I hope this helps and have a great day!

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Find the sum of the series given in sigma notation.
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Answer:

Option b is correct 175

Step-by-step explanation:

n = 7

k = 6

3k -2 ------1

put k = 6 in above eq. for finding first term

  a1 = 3(6) - 2  = 18 - 2 = 16

put k = 7 in above eq. for finding first term

 a2 = 3(7) - 2 = 21 - 2 = 19

 a3 = 3 (8) - 2 = 24 - 2 = 22

16, 19 , 22, ...  //Arithmetic series formation

a1 = 16 , a2 = 19

d = a2 - a1 = 19 - 16 = 3 //Difference of first two terms

Using sum forumula for arithmetic series

sum = \frac{n}{2}(2a1 + (n-1)d)

      = \frac{7}{2}(2a1 + (7-1)d)

      = \frac{7}{2}(2(16) + (6)3)

      =  \frac{7}{2}(32 + 18)    

      =  \frac{7}{2}(50)

      = 7 * 25

      = 175




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Help! With Fraction Problems??? Hailey is knitting a scarf. Each half hour, she adds 3/7 inch to the scarf's length. How much le
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Jonas wants to mail a package that weighs 4.2 kilogram. how much dose the package weigh in pounds?
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jonas wants to mail a package that weighs 4.2 kilogram. how much dose the package weigh in pounds?​

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Convert to pounds

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therefore

the answer is 9.24 pounds

7 0
1 year ago
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