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yan [13]
3 years ago
10

Simplify the product using FOIL. (4x + 3)(2x + 5)

Mathematics
2 answers:
Dennis_Churaev [7]3 years ago
4 0
Hello there!

Simplify the product using FOIL. (4x + 3)(2x + 5)

 
Your answer is: 8x^2 + 26x + 15
-----------------------------------------------------------------------------------------------------

Explanation/Work:

So, what is FOIL?

FOIL:

First

Outside

Inside

Last


First: 4x * 2x = 8x^2

Outside: 4x * 5 = 20x

Inside: 3 * 2x = 6x

Last: 3 * 5 = 15

This is: 8x^2 + 20x + 6x + 15

Now, let's simplify this

20x + 6x = 26x

Our final answer is: 8x^2 + 26x + 15


I hope I helped!

~ Fire

Dafna1 [17]3 years ago
3 0
8x^2+20x+6x+15. Combine like terms. 8x^2+26x+15. When using foil just multiply the contents of one pair of brackets on another pair.
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Using the Empirical Rule and the Central Limit Theorem, we have that:

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<h3>What does the Empirical Rule state?</h3>

It states that, for a normally distributed random variable:

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<h3>What does the Central Limit Theorem state?</h3>

By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

In this problem, the standard deviation of the distribution of sample means is:

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99.7% of the means are within 3 standard deviations of the mean, hence the bounds are:

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