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3 years ago

Select the correct answer from the drop-down menu.

Mathematics

2 answers:

snow_tiger [21]3 years ago

8 0

Answer: $33.80

Step-by-step explanation: If Hector’s account was overdrawn by $22.80 and then he deposited $56.60 his balance would be $33.80

The formula to solve this is -22.80 + 56.60 = 33.80

seraphim [82]3 years ago

3 0

Answer:

$33.80

Step-by-step explanation:

i did it on my test got it right

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Mark had some money. He gave half of that to his brother and then he gave another $5 to his sister. He now has $20. How much mon

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Answer:

45 $

Step-by-step explanation:

20 x 2 = 40

40 + 5 = 45

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The perimeter of a rectangle is 343434 units. Its width is 6.56.56, point, 5 units.

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4 years ago

If 90 percent of automobiles in Orange County have both headlights working, what is the probability that in a sample of eight au

Marta_Voda [28]

Answer:

$P(X \geq 7) = P(X=7) +P(X=8)$

And we can find the individual probabilities using the probability mass function

$P(X=7)=(8C7)(0.9)^7 (1-0.9)^{8-7}=0.3826$

$P(X=8)=(8C8)(0.9)^8 (1-0.9)^{8-8}=0.4305$

And replacing we got:

$P(X \geq 7) = P(X=7) +P(X=8)=0.3826 +0.4305=0.8131$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest "number of automobiles with both headligths working", on this case we now that:

$X \sim Binom(n=8, p=0.9)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And for this case we want to find this probability:

$P(X \geq 7) = P(X=7) +P(X=8)$

And we can find the individual probabilities using the probability mass function

$P(X=7)=(8C7)(0.9)^7 (1-0.9)^{8-7}=0.3826$

$P(X=8)=(8C8)(0.9)^8 (1-0.9)^{8-8}=0.4305$

And replacing we got:

$P(X \geq 7) = P(X=7) +P(X=8)=0.3826 +0.4305=0.8131$

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4 years ago

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levacccp [35]

The amount of money Adelaide paid for the manicure including the tip to the manicurist is $35. So the amount paid by Adelaide includes both the payment for manicure as well as the payment for tip. The percentage of tip given is 20%. Firstly it is necessary to find the amount of tip given. Then only the amount given for the job of manicyre can be easily found.
Amount of tip given to the manicurist by Adelaide = (35 * 20/100) dollars
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3 years ago

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Elan Coil [88]

The value of h(6) of the given function is; h(6) = -7

<h3>Input value of functions</h3>

We are given the function;

h(x) = -x - 1

Now, want to find h(6)

To find h(6), all we need to do is to put 6 as the input value for x in the given function to get;

h(6) = -6 - 1

h(6) = -7

Read more about Input Value of Functions at; brainly.com/question/10283950

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