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2 years ago

If anyone can help me :)) 3n/9n-1

Mathematics

1 answer:

Arisa [49]2 years ago

8 0

Answer:

-2/3

Step-by-step explanation:

Simplify each term.

Rewrite the division as a fraction.

3 n/ 9 n − 1

Cancel the common factor of 3 and 9 .

n/ 3 n − 1

Cancel the common factor of n .

1 /3 − 1

To write − 1 as a fraction with a common denominator, multiply by 3/3

1 /3 − 1 x 3/3

Combine − 1 and 3/ 3 .

1/ 3 + − 1 x3 /3

Combine the numerators over the common denominator.

1 − 1 x 3/3

Simplify the numerator.

− 2 /3

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According to the rule of 72, in about how many years will $80 be worth $40 if

ludmilkaskok [199]

Answer:

24 Years

Step-by-step explanation:

Rule of 72 is an approximation that you can use to estimate the time it will take for something to double in value at a compound rate of interest

use the following equation

72/(i*100)

we have

72/(.03*100)

72/3=24

3 0

2 years ago

4 Find a formula for the exponential function passing through the points (-2, 4/9) and (3, 108)

NemiM [27]

9514 1404 393

Answer:

f(x) = 4·3^x

Step-by-step explanation:

We assume the function will be of the form ...

f(x) = a·b^x

Substituting the given values, we can find 'a' and 'b'.

4/9 = a·b^(-2)

108 = a·b^3

Dividing the second equation by the first gives ...

108/(4/9) = b^(3 -(-2))

243 = b^5

b = 3 . . . . . . 5th root

Using the second equation, we can find 'a':

108 = a·3^3 = 27a

a = 108/27 = 4

The formula for the exponential function is ...

f(x) = 4·3^x

3 0

2 years ago

A couple wants to have three children. Assume that the probabilities of a newborn being male or being female are the same and th

liberstina [14]

Answer:

Let the G represent the Girl child

and, B represents the Boy child.

Then Sample Space = {BGG, GBG, GGB, BBG, BGB, GBB, BBB, GGG}

Thus, There are 8 sample space.

Then, Probability that couple have 1 boy = {BGG, GBG, GGB}

= 3 ÷ 8 = 0.375

Probability that couple have 2 boys = { BBG, BGB, GBB}

= 3 ÷ 8 = 0.375

Probability that couple have 3 boys = {GGG}

= 1 ÷ 8 = 0.125

7 0

3 years ago

[tex] \frac{x}{7.68}+5=8 Please help solve it.

Leona [35]

I hope this helps you

x.7,68=3

x=3/7,68

x=0,3906

3 0

3 years ago

Explain why the solution of 5x – 3 > 14.5 or 5 x minus 3 greater than 14.5 or StartFraction 2 x plus 5 over 3 EndFraction les

slega [8]

Answer:

There is no point where x = 3.5

Step-by-step explanation:

Given the inequality

5x – 3 > 14.5

We are to find the range of all values of x

Add 3 to both sides of the equation;

5x - 3 + 3 > 14.5+ 3

5x > 17.5

x > 17.5/5

x > 3.5

Also for the inequality;

$\frac{2x+5}{3}$

Cross multiply;

$2x+5 < 3(4)\\2x + 5 < 12\\$

Subtract from both sides;

$2x + 5-5 < 12-5\\2x < 7\\x$

The solution to both inequalities are x > 3.5 and x < 3.5. Since there is no point where x = 3.5, hence the solution will have solution on all real numbers except at x = 3.5

6 0

2 years ago