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3 years ago

6

Nick and Adam workout together. Nick weighs 160 pounds and is gaining about 3 pounds per week. Adam weighs 195 pounds and is los

ing about 2 pounds each week. Write an equation that can be used to find the number of weeks that it will take them to weigh the same amount.

1 answer:

Gekata [30.6K]3 years ago

4 0

Answer:

x=7

Step-by-step explanation:

(160+3x)=(195-2x)

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And replacing we got:

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And replacing we got:

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Step-by-step explanation:

We have the following distribution

x 0 1 2 3 4

P(x) 0.2 0.3 0.1 0.1 0.3

Part a

For this case:

$P(X=3) = 0.1$

Part b

We want this probability:

$P(X\geq 3) =1-P(X$

And replacing we got:

$P(X \geq 3) = 1- [0.2+0.3+0.1]= 0.4$

Part c

For this case we want this probability:

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Part d

$P(X=0) = 0.2$

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We can find the mean with this formula:

$E(X)= \sum_{i=1}^n X_i P(X_i)$

And replacing we got:

$E(X) =0*0.2 +1*0.3+2*0.1 +3*0.1 +4*0.3= 2$

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And replacing we got:

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