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3 years ago

25 lbs is % of 121 lbs; 121 lbs is % of 25 lbs

Mathematics

2 answers:

saw5 [17]3 years ago

4 0

20.6% or 21% and 484%

murzikaleks [220]3 years ago

3 0

Hi there! the answer and explanation is...

Percentage is out of 100, so we can set up a proportion with 25/121 = x/100. Solve for x by cross multiplying.

25*100 = 121x
x = 2500/121 = 20.661%

Do the same thing for the next one.
121/25 = x/100

121*100 = 25x
x = 12100/25 = 484%

hope this helped! have a good one!

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zhannawk [14.2K]

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3 years ago

Line AB is Perpendicular to line BC. A=(-3,2) and C=(2,7). Which of the following could be the coordinates of B? Select all that

Llana [10]

Answer:

The answer would be Choice F; (-3,7)

Step-by-step explanation:

Plot the two guaranteed given points
A, (-3,2) and C, (2,7)
Find the point where the x and y would share and then form a right angle. This is called being Perpendicular.
So, take the <em>x</em> of A, and the <em>y</em> of C and you have the coordinates of B.

(-3,7)

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3 years ago

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Nataly_w [17]

Answer:

Step-by-step explanation:

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3 years ago

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In a list of households, own homes and do not own homes. Five households are randomly selected from these households. Find the p

hichkok12 [17]

Answer:

The probability of success for this case would be:

$p =\frac{9}{15}= 0.6$ representing the proportion of homes that are own homes

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=15, p=0.6)$

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 we want this probability:

$P(X=3)$

And uing the probability mass function we got:

$P(X=3)= 15C3 (0.6)^3 (1-0.6)^{15-3}= 0.00165$

Step-by-step explanation:

Adduming the following info: In a list of 15 households, 9 own homes and 6 do not own homes. Five households are randomly selected from these 15 households. Find the probability that the number of households in these 5 own homes is exactly 3.

Round your answer to four decimal places

P (exactly 3)=

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

The probability of success for this case would be:

$p =\frac{9}{15}= 0.6$ representing the proportion of homes that are own homes

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=15, p=0.6)$

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 we want this probability:

$P(X=3)$

And uing the probability mass function we got:

$P(X=3)= 15C3 (0.6)^3 (1-0.6)^{15-3}= 0.00165$

4 0

3 years ago

How do I do problem number one

jolli1 [7]

So you have to find something that multiples to six but also somehow either subtracts or adds to five. So I would pick 2 and 3 because two plus three is five. Then you would write out your equation
X2+2x+5x+6
This may not be the way your teacher taught however it is much easier for me to do it this way.

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4 years ago

25 lbs is ____ % of 121 lbs; 121 lbs is ____ % of 25 lbs

25 lbs is % of 121 lbs; 121 lbs is % of 25 lbs