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3 years ago

2n − 2n + 4n = 20 solve for n

Mathematics

2 answers:

olga2289 [7]3 years ago

3 0

2n-2n+4n=20

combine like terms→4n=20

divide both sides by 4→4n/4=20/4

n=5

Rashid [163]3 years ago

3 0

First we must figure out 2n-2n. This will equal 0n, or 0. Then, this means that 4n is equal to 20. As follows,

4×5=20
n=5

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2 years ago

Harlp needed ok thanks dudes

Ivanshal [37]

Solution:

A few definitions...

Rational number - Any integer, fraction, terminating decimal, or repeating decimal is classified as a rational number
Irrational number - All the real numbers which are not rational numbers.

Option A - Rational or Irrational?

1/2 + 1/3

Since both are known as fractions, they are rational numbers.

Option B - Rational or Irrational?

√2 + 5/2

√2 is classified as an Irrational number because if it is simplified, it does not result in any integer, fraction, terminating decimal, or repeating decimal.

Option C - Rational or Irrational?

1/√4 + 7/2
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Since this is an integer, this is rational.

Option D - Rational or Irrational?

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In conclusion...

Option B is correct.

8 0

2 years ago

Simplify (16+28/2-6)/10-4*2

Tpy6a [65]

Answer:

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Step-by-step explanation:

4 0

3 years ago

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A population has the following characteristics.(a) A total of 25% of the population survives the first year. Of that 25%, 75% su

zaharov [31]

Answer:

After 1st year, the age distribution will be

$x_1 = \left[\begin{array}{ccc}1584\\36\\108\end{array}\right]$

After 2nd year, the age distribution will be

$x_2 = \left[\begin{array}{ccc}5256\\396\\27\end{array}\right]$

Step-by-step explanation:

A population has the following characteristics.

A total of 25% of the population survives the first year. Of that 25%, 75% survives the second year.

The average number of offspring for each member of the population is 3 the first year, 5 the second year, and 3 the third year.

From the above information, we can construct a transition age matrix.

$A = \left[\begin{array}{ccc}3&5&3\\0.25&0&0\\0&0.75&0\end{array}\right]$

The population now consists of 144 members in each of the three age classes.

From the above information, we can construct the current age matrix.

$x = \left[\begin{array}{ccc}144\\144\\144\end{array}\right]$

How many members will there be in each age class in 1 year?

After 1st year, the age distribution will be

$x_1 = A \cdot x$

$x_1 = \left[\begin{array}{ccc}3&5&3\\0.25&0&0\\0&0.75&0\end{array}\right] \times \left[\begin{array}{ccc}144\\144\\144\end{array}\right]$

The matrix multiplication is possible since the number of columns of first matrix is equal to the number of rows of second matrix.

$x_1 = \left[\begin{array}{ccc}1584\\36\\108\end{array}\right]$

After 2nd year, the age distribution will be

$x_2 = A \cdot x_1$

$x_2 = \left[\begin{array}{ccc}3&5&3\\0.25&0&0\\0&0.75&0\end{array}\right] \times \left[\begin{array}{ccc}1584\\36\\108\end{array}\right]$

$x_2 = \left[\begin{array}{ccc}5256\\396\\27\end{array}\right]$

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4 years ago

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Alchen [17]

take 431.2 and divide by 24.5
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4 years ago

Read 2 more answers