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weqwewe [10]
2 years ago
7

Therefore, the sum of two rational numbers will always be

Mathematics
2 answers:
ahrayia [7]2 years ago
7 0

Answer: Itll always be a rational number and never zero

Step-by-step explanation:

Volgvan2 years ago
7 0

Answer:

A rational number (The third option).

Step-by-step explanation:

1. By definition, rational numbers have the following form, where and are integers and b\neq 0.

2. Therefore, when you add two rational numbers, the result will be a rational number.

3. An example is shown below:

\frac{1}{5}+\frac{2}{5}+\frac{3}{5}

The result is a fraction whose numerator and denominator are integers.

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easy points!

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Please simplify the following distributive property expression:
guapka [62]

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3 years ago
A manufactured product has a length that is normally distributed with a mean of 12 cm. The product will be unusable if the lengt
Sav [38]

Answer:

a) σ  = 0,1612

b) P [ 11,75 < X < 12,35] = 0,92,44   or    92,44 %

Step-by-step explanation:

NOTE: I assume the unusable length s 11,5 and less

a) For a normal distribution, the probability of P = 0,01 corresponds to z(score) =  -3,1 then:

- 3,1 = ( X - μ₀ ) / σ

- 3,1 = (11,5 - 12 )/ σ

-3,1 = - 0,5 / σ

σ  = 0,1612

b) If σ = 0,1612

P [ 11,75 < X < 12,35]

z₁ (score)  = ( 11,75 - 12 ) / 0,1612

z₁  = - 0,25/ 0,1612

z₁  = -1,55

From z table  P [ 11,75 < X] = 0,0606

z₂ (score) = ( 12,35 - 12) / 0,1612

z₂ = 0,35 / 01612

z₂ = 2,17

From z table  P [ X < 12,35] = 0,9850

Finally P [ 11,75 < X < 12,35] = 0,9850 -  0,0606

P [ 11,75 < X < 12,35] = 0,92,44   or    92,44 %

5 0
3 years ago
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