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2 years ago

In triangle ABC, AB=c, BC=a, CA=b

Mathematics

1 answer:

quester [9]2 years ago

7 0

Answer:

Step-by-step explanation:

Correct option is

tanθ=

Hence

BD=DE=EC=

and △ABC is a right angled triangle.

Now

cosC=

2.AC.EC

+EC

−AE

=AC

+EC

−2.AC.EC.cosC

)

−2.8.

.cosC

=16+

−

2×4×5

169

−

169−96

Hence

cosθ=

2.AE.4

−

Hence

secθ=

Now

tanθ=

sec

θ−1

−1

solution

Expand-image

Correct option is

tanθ=

Hence

BD=DE=EC=

and △ABC is a right angled triangle.

Now

cosC=

2.AC.EC

+EC

−AE

=AC

+EC

−2.AC.EC.cosC

)

−2.8.

.cosC

=16+

−

2×4×5

169

−

169−96

Hence

cosθ=

2.AE.4

−

Hence

secθ=

Now

tanθ=

sec

θ−1

−1

solution

Expand-image

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Answer:

45% probability that a randomly selected customer saw the advertisement on the internet or on television

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that a customer saw the advertisement on the internet.

B is the probability that a customer saw the advertisement on television.

We have that:

$A = a + (A \cap B)$

In which a is the probability that a customer saw the advertisement on the internet but not on television and $A \cap B$ is the probability that the customers saw the advertisement in both the internet and on television.

By the same logic, we have that:

$B = b + (A \cap B)$

12% saw it on both the internet and on television.

This means that $A \cap B = 0.12$

20% saw it on television

This means that $B = 0.2$

37% of customers saw the advertisement on the internet

This means that $A = 0.37$

What is the probability that a randomly selected customer saw the advertisement on the internet or on television

$A \cup B = A + B - (A \cap B) = 0.37 + 0.2 - 0.12 = 0.45$

45% probability that a randomly selected customer saw the advertisement on the internet or on television

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2 years ago

PLSSS help quickly worth 20 pts

gayaneshka [121]

1.09 that's the answer ! I just wrote extra stuff for the sake of it . x= 1.09

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3 years ago

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Radda [10]

Answer:

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Step-by-step explanation:

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3 years ago

A phone company charges $0.50 per minute and a connection fee of $1. If you were to represent the total cost y of an x minute ca

klasskru [66]

Answer:

Per minute value fee would be the slope of the line.

Step-by-step explanation:

Given:

Per minute charges by the phone company = $ 0.50

Connection fee (fixed) charged by company = $ 1.0

We have to represent the total cost in terms of y and also explain the slope of the line.

According to the question:

Let the number of minutes be "x" .

And the total cost charged be "y" .

So,

The total cost = (No. of minutes)(Per minute charge) + Connection fee

Re-arranging in term of x and y.

⇒ $total\ cost = (no.\ of\ minutes)(per\ minute\ charge) + connection\ fee$

⇒ $y=0.50(x)+1$ ...equation (i)

Slope- intercept form: $y=m(x) +b$ m is the slope and b is the y-is intercept.

⇒ Comparing equation (i) with the slope- intercept form.

⇒ $m=0.50$ and $b=1$

So,

The slope of the line is 0.50 which is also represented by the per minute value of the call.

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3 years ago

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viktelen [127]

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3 years ago