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allochka39001 [22]
2 years ago
12

1 2/7 +2 1/3x +3/14+x=9

Mathematics
1 answer:
Genrish500 [490]2 years ago
8 0

Answer:

9/4

Step-by-step explanation:

1 2/7=9/7

2 1/3=7/3

--------------

9/7+7/3x+3/14+x=9

18/14+3/14+7/3x+3/3x=9

21/14+10/3x=9

10/3x=9-21/14

10/3x=9-3/2

10/3x=18/2-3/2

10/3x=15/2

x=(15/2)/(10/3)

x=(15/2)(3/10)

x=45/20

simplify

x=9/4

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Karo-lina-s [1.5K]

Answer:

x= -33/2 or x=-16.5

Step-by-step explanation:

Expand the bracket

6(2x+3) = 2(5x-3)

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Bring like terms together

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3 years ago
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Answer:


Step-by-step explanation:

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5 0
3 years ago
In a particular class, there are 3 freshmen, 5 sophomores, 11 juniors, and 2 seniors. If the instructor randomly chooses a stude
Monica [59]
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A random sample of 7 fields of durum wheat has a mean yield of 29.8 bushels per acre and standard deviation of 3.62 bushels per
meriva

Answer:

CI = 29.8 ± 3.53

Critical value is z = 2.58

Step-by-step explanation:

First of all let's find margin of error. It is given by the formula;

ME = zσ/√n

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3 years ago
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