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Tems11 [23]
4 years ago
6

The sum of twice a number and five is 13. Find the number.

Mathematics
2 answers:
Arlecino [84]4 years ago
8 0

Answer:

the number is 4

Step-by-step explanation:

let the number be ''x''

than twice the number will be 2x

now,

2x + 5 = 13

2x = 13 - 5  

2x = 8

x = 8/2    

x= 4

Eduardwww [97]4 years ago
6 0

4

let the number be x

so by the question , 2x+5=13

solving this we get ,

2x=13-5

2x=8

so x=4

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Which expression is equivalent to the expression shown below?
OlgaM077 [116]

Answer:

5^{15}

Step-by-step explanation:

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7 0
3 years ago
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ExtremeBDS [4]

Answer:

a) 26.33 kg/d and 29.67 kg/d

b) 94.5%

Step-by-step explanation:

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We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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The lower end of the interval is the sample mean subtracted by M. So it is 28 - 1.67 = 26.33 kg/d

The upper end of the interval is the sample mean added to M. So it is 28 + 1.67 = 29.67 kg/d

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b. If the farms want the confidence interval to be no wider than ± 1.25 kg/d, what level of confidence would they need to use?

We need to find z initially, when M = 1.25.

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1.25 = z*\frac{2.25}{\sqrt{12}} = 1.67

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6 0
3 years ago
34 is 13.7% of what number
fomenos

Answer:

4.66

Step-by-step explanation:

Have a good day :)

6 0
3 years ago
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shtirl [24]

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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