3 years ago

Which expression is equivalent to (4x + 7y) + 5z?

Mathematics

1 answer:

Oliga [24]3 years ago

4 0

It's an Associative property (a + b) + c = a + (b + c)

<h3>Answer: A)</h3>

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A 97% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A prelimina

ivann1987 [24]

Answer:

The sample size will be " $102.5494 \sim 102$ ". A further explanation is given below.

Step-by-step explanation:

Let the sample size will be:

= n

The given values are:

Standard deviation,

= 1.4

ME,

= 0.3

As we know,

⇒ $n=(Z \frac{a}{2}\times \frac{SD}{E})^2$

On putting the estimated values, we get

⇒ $=(2.17\times \frac{1.4}{0 .3})^2$

⇒ $=(\frac{3.038}{0.3})^2$

⇒ $=102.5494 \sim 102$

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aleksandr82 [10.1K]

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