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4 years ago

Fill in the blank 31+____=61

Mathematics

2 answers:

eimsori [14]4 years ago

7 0

31+ ____ = 61
⇒ ____= 61 -31
⇒ ____= 30

The final answer is 30~

saveliy_v [14]4 years ago

6 0

31 plus 30 equals to 61

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Nimfa-mama [501]

Answer:

n= 21

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Step-by-step explanation:

The expression is given as;

(3x⁷)⁴

Apply the brackets law of indices which states that :

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3 years ago

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Rainbow [258]

Answer:

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(b) 0.2514

Step-by-step explanation:

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(a)

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(b)

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$P(X>66)=P(\frac{X-\mu}{\sigma}>\frac{66-64}{3})\\\\=P(Z>0.67)\\\\=1-P(Z$

Thus, the probability that a randomly selected woman is taller than 66 inches is 0.2514.

(c)

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$P(\bar X>66)=P(\frac{\bar X-\mu}{\sigma/\sqrt{n}}>\frac{66-64}{3/\sqrt{100}})\\\\=P(Z>6.67)\\\\\ =0$

Thus, the probability that the mean height of a random sample of 100 women is greater than 66 inches is 0.

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