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3 years ago

Identity the property used in the first five steps to solve the equation 2(x-5)-6x=-22

1 answer:

6 0

2 ( x - 5 ) - 6 x = - 22

2 * x - 2 * 5 - 6 x = -22

2 x - 10 - 6 x = -22

2 x - 6 x = - 22 + 10

- 4 x = - 12 * ( - 1 )

x = 12 / 4

x = 3

hope this helps!

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enot [183]

Answer:

$P(x < 3) = 25\%$

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Step-by-step explanation:

The given parameters can be represented as:

$\begin{array}{ccccccc}x & {5} & {4} & {3} & {2} & {1}& {0} & P(x) & {25\%} & {30\%} & {20\%} & {15\%} & {5\%} & {5\%} \ \end{array}$

Solving (a): P(x < 3)

This is calculated as:

$P(x < 3) = P(x = 0) + P(x = 1) + P(x =2)$ ----- i.e. all probabilities less than 3

So, we have:

$P(x < 3) = 5\% + 5\% + 15\%$

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Solving (b): Expected number of events

This is calculated as:

$E(x) = \sum x * P(x)$

So, we have:

$E(x) = 5 * 25\% + 4 * 30\% + 3 * 20\% + 2 * 15\% + 1 * 5\% + 0 * 5\%$

$E(x) = 125\% + 120\% + 60\% + 30\% + 5\% + 0\%$

$E(x) = 340\%$

Express as decimal

$E(x) = 3.40$

Approximate to the nearest integer

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Answer:

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Step-by-step explanation:

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