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choli [55]
1 year ago
7

Solve the unknown21​

Mathematics
2 answers:
nignag [31]1 year ago
8 0

Answer:

The trick to this problem is that first you have to subtract the digits and then add them. For example:

6 and 4, if we subtract them, we get 2 and if we add them, we get 10, therefore the answer is 210.

9 and 2, if we subtract them, we get 7 and if we add them, we get 11, therefore the answer is 711.

This works for the rest of the numbers as well and we can use it for the unknown problem

8 - 3 = 5

8 + 3 = 11

Therefore, the answer is 511

MakcuM [25]1 year ago
7 0

Answer:

\fbox{511}

<h3>Explanation:</h3>

6+4=(6 - 4)(6 + 4) = 210

9+2=(9  - 2)(9 + 2) = 711

8+5=(8 - 5)(8 + 5) = 313

3+2=(3 - 2)(3 + 2) = 15

following the same pattern,

8+3=(8 - 3)(8 + 3) = 511

\sf \small Thanks \:  for \:  joining \:  brainly  \: community!

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Answer:

We define the random variable X as the walking age and we are interested if American children learn to walk less than 15 months so then that would be the alternative hypothesis and the complement would be the null hypothesis.

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And for this case the best answer would be:

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Step-by-step explanation:

We define the random variable X as the walking age and we are interested if American children learn to walk less than 15 months so then that would be the alternative hypothesis and the complement would be the null hypothesis.

Null hypothesis: \mu \geq 15

Alternative hypothesis: \mu

And for this case the best answer would be:

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And the data given from the sample is:

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\sigma represent the population deviation

n = 40 represent the sample size

And the statistic would be given by:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

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