HELP PLEASE Two expressions that are equivalent to 4(6j+9+2j)

Mathematics

2 answers:

mr Goodwill [35]3 years ago

6 0

1) 4(8j + 9)

2) 24j + 36 + 8j

Is this what you are looking for????

Elza [17]3 years ago

4 0

You can get two equivalent expression while simplifying the original.

<span>4(6j+9+2j) combine like terms inside the parentheses
</span>
4(8j+9) there's one :), now expand by performing indicated multiplications

32j+36 there's another one :)

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andrezito [222]

Answer:

$\frac{(a+b)}{a^{2} -b^{2} }$ + $\frac{(a-b)}{a^{2} -b^{2} }$ = $\frac{2a}{a^{2} -b^{2} }$

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio

Bess [88]

Answer:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample