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3 years ago

The first four terms of an arithmetic sequence are given by a1= 6, a2 = 12,

Mathematics

1 answer:

Advocard [28]3 years ago

6 0

Answer:

an=6+6(n-1)

Step-by-step explanation:

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What is 5 ÷ 1/5 <br> I really need help with dividing whole numbers by fractions

salantis [7]

Answer:

Step-by-step explanation:

When dividing by fractions, you can multiply by the opposite reciprocal.

5 ÷ 1/5

5 x 5/1

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2 years ago

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A certain virus infects one in every 200 people. a test used to detect the virus in a person is positive 70% of the time when t

V125BC [204]

We're told that

$P(A)=\dfrac1{200}=0.005\implies P(A^C)=0.995$

$P(B\mid A)=0.7$

$P(B\mid A^C)=0.05$

a. We want to find $P(A\mid B)$ . By definition of conditional probability,

$P(A\mid B)=\dfrac{P(A\cap B)}{P(B)}$

By the law of total probability,

$P(B)=P(B\cap A)+P(B\cap A^C)=P(B\mid A)P(A)+P(B\mid A^C)P(A^C)$

Then

$P(A\mid B)=\dfrac{P(B\mid A)P(A)}{P(B\mid A)P(A)+P(B\mid A^C)P(A^C)}\approx0.0657$

(the first equality is Bayes' theorem)

b. We want to find $P(A^C\mid B^C)$ .

$P(A^C\mid B^C)=\dfrac{P(A^C\cap B^C)}{P(B^C)}=\dfrac{P(B^C\mid A^C)P(A^C)}{1-P(B)}\approx0.9984$

since $P(B^C\mid A^C)=1-P(B\mid A^C)$ .

4 0

2 years ago

Pls ans I will give brilliant who ever ans first!

Degger [83]

Answer:

Step-by-step explanation:

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7 0

2 years ago

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The original price of a measuring tape is $4.30. How much will Hector pay if he buys it during the sale?

Murrr4er [49]

Answer:

how much percent is off?

Step-by-step explanation:

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2 years ago

Use angle relationships and the diagram below to write and solve an equation for x.

tatuchka [14]

Answer:

x = 7 degrees

Step-by-step explanation:

4x-5 = 2x + 9

-2x -2x

2x-5 = 9

+5 +5

2x = 14

2x/2 =14 /2

x= 7

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2 years ago