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4 years ago

-7(7-4b) -8What will be the answer if I change it

Mathematics

1 answer:

kondor19780726 [428]4 years ago

4 0

Hi there! :)

Answer:

=28b-57

*The answer must have a positive sign.*

Step-by-step explanation:

<h2>Lesson: Distributive property</h2>

Distributive property: a(b+c)=ab+ac

First, you expand or multiply by the numbers from left to right.

$7*7=49$

$7*4=28$

It change positive to negative sign.

$-49+28b-8$

Finally, you add/subtract by the numbers from left to right.

$49+8=57$

It change positive to negative sign.

$=28b-57$

Final answer is 28b-57

I hope this helps you!

Have a nice day! :)

-Charlie

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The probability is 0.33696

Step-by-step explanation:

The probability that the outcome will be heads x times is calculated using the following equation:

$P(x) = nCx*p^{x} *(1-p)^{n-x}$

nCx is calculated as:

$nCx=\frac{n!}{x!(n-x)!}$

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So, In this case, n is equal to 5, and p is equal to 0.6 because we are going to call success the event in which the outcome of the coin is head.

Then, the probability that the outcome will be heads at least 4 times is calculated as:

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And P(5) is:

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