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3 years ago

Solve for X 3X+20=2X+24

Mathematics

2 answers:

andrew11 [14]3 years ago

4 0

First subtract the 20 from both sides so it is 3x=2x+4 thens ubtract the 2 so x equals 4

bezimeni [28]3 years ago

3 0

You said    3x + 20 = 2x + 24

Subtract 2x from each side:    x + 20 = 24

Subtract 20 from each side:    x    =    4

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44/35 as a mixed number

joja [24]

44/35 = 1 9/35

So, your answer is 1 9/35

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3 years ago

Read 2 more answers

jonah wants to buy two copies of a book. which algebraic expression could jonah use to find the value of the items

Bezzdna [24]

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5 0

3 years ago

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

Which number is rational?

salantis [7]

The last one is rational because it is a terminating decimal.

8 0

3 years ago

1. Avital counted 40 green cars and 20 silver cars in the parking lot. If the number of green cars stay the same, how many more

Luba_88 [7]

X represents the number that would be added to the silver cars.

x/40= 4
X=40x4
x=160

Subtract the given 20 from 160 because 160 is the total number
160-20=140
Therefore 140 would be added to 20 silver cars to get the ratio1:4

8 0

3 years ago