2 years ago

3x+4=8y-3 5x+1=10y-4

Mathematics

1 answer:

dsp732 years ago

4 0

Answer:

x-3 and y=2

Step-by-step explanation:

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If it is to match 3+1 which is 4 the value to satisfy X is -1

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enot [183]

Answer:

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

$E(x) = 3$

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:

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

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

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

$E(x) = 3$

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2 years ago

What is 20 times 30 times 100

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Answer:

Step-by-step explanation:

20 times 30 is 600!

600 times 100 is 60,000!

The answer is 60,000!

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2 years ago

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15 red marbles
12 green marbles
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Answer:

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We are given opposite and adjacent, so use tangent

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