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Karo-lina-s [1.5K]

2 years ago

12

448 = -5v + 8(-5 - 7v) What is v?

2 answers:

Andrew [12]2 years ago

7 0

Step-by-step explanation:

<em>4</em><em>4</em><em>8</em><em> </em><em>=</em><em> </em><em>-</em><em> </em><em>5</em><em> </em><em>v </em><em>-</em><em> </em><em>4</em><em>0</em><em> </em><em>-</em><em> </em><em>5</em><em>6</em><em> </em><em>v </em>

<em>4</em><em>4</em><em>8</em><em> </em><em>+</em><em> </em><em>4</em><em>0</em><em> </em><em>=</em><em> </em><em>-</em><em> </em><em>6</em><em>1</em><em> </em><em>v </em>

<em>4</em><em>8</em><em>8</em><em> </em><em>=</em><em> </em><em>-</em><em> </em><em>6</em><em>1</em><em> </em><em>v </em>

<em>v </em><em>=</em><em> </em><em>-</em><em> </em><em>8</em>

lapo4ka [179]2 years ago

3 0

Answer:

v = -8

Step-by-step explanation:

First we would have to distribute the 8(-5 - 7v). To do this we would multiply 8 by -5 and 8 by -7v to get $448=-5v-40-56v$ . After this, we would have to simplify like terms by subtracting 56v from -5v to get $448=-61v-40$ . We now have to get the variable on one side and to do that, we can add 40 to both sides to get $488=-61v$ . Finally to get the variable alone, we would have to divide both sides by -61 to get $v=-8$ .

Brainliest would be appreciated!

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b. $P(E_2/A)=0.395$ \

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a.We have to find the probability Mr.Brophy is a good driver

Bayes theorem, $P(E_i/A)=\frac{P(A/E_i)\cdot P(E_1)}{\sum_{i=1}^{i=n}P(A/E_i)\cdot P(E_i)}$

We have to find $P(E_1/A)$

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$P(E_1/A)=\frac{P(A/E_1)\cdot P(E_1)}{P(E_1)\cdot P(A/E_1)+P(E_2)P(A/E_2)+P(E_3)P(A/E_3)}$

Substitute the values then we get

$P(E_1/A)=\frac{0.30\times 0.01}{0.01\times 0.30+0.50\times 0.03+0.20\times 0.10}$

$P(E_1/A)=0.0789$

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$P(E_2/A)=\frac{0.03\times 0.50}{0.038}=0.395$

c.We have to find the probability Mr.Brophy is a poor driver

$P(E_3/A)=\frac{0.20\times 0.10}{0.038}=0.526$

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