can someone please help meeee its urgent I don’t get this

Answer:

[tex]n_1=(3 + 1\sqrt{5} )/2\\\\n_2=(3 - 1\sqrt{5} )/2[/tex]

Step-by-step explanation:

[tex]2n^2= 6n - 2\\\\2n^2-6n+2=0\\\\a=2\\\\b=-6\\\\c=2[/tex]

[tex]n=(-b \pm \sqrt{b^2-4ac} )/2a\\\\n=(-(-6) \pm \sqrt{(-6)^2-4(2)(2)} )/2(2)\\\\n=(6 \pm \sqrt{36-16} )/4\\\\n=(6 \pm \sqrt{20} )/4\\\\n=(6 \pm 2\sqrt{5} )/4\\\\n=(3 \pm 1\sqrt{5} )/2\\\\n_1=(3 + 1\sqrt{5} )/2\\\\n_2=(3 - 1\sqrt{5} )/2[/tex]

Answer:

4.7619%

Step-by-step explanation:

Let's suppose the insurance company sells 16 standard policies.

For every 16 standard policies sold, the company sells 1/4 x 16, or 4, preferred policies.

For every 4 preferred policies sold, the company sells 1/4 x 4, or 1, ultra-preferred policy.

Therefore, for every ultra-preferred policy sold, the company sells:

16+4+1=21 total policies

So the probability of any 1 random policy selected being ultra-preferred is 1/21, or 4.7619% ....................

Answer:

A  -(27x + 7)

B -(15x + 8 )

C -9(2x + 1 )

Step-by-step explanation:

-1/2 (30x + 16) = -15x-8

Answer:

A) The price of product A is increasing by 3% per year.

(B) The product A recorded a greater percentage change in price over the previous year.

Step-by-step explanation:

(A)

The function representing the price, in dollars, of product A after x years is:

FA(x)=0.69*(1.03)x

The function  FA(x)can be written as:

FA(x)=0.69*1+(0.03)x

The function FA(x) is similar to the exponential growth function, y=a(1+r)x .

Here r is the growth rate.

Thus, it can be said that the price of product A is increasing by 3% per year.

(B)

Consider the data of product B for the year 3 and 4.

The price of product B for year 3 and 4 are 10,303.01 and 10,406.04.

Compute the percent price change from year 3 to 4 as follows:

10406.04-10303.01/10303.01*100

which is 0.999%

~1%

The price of product B is increasing by 1% per year.

Thus, the product A recorded a greater percentage change in price over the previous year.

Answer:

decrease

Step-by-step explanation:

i got it right on prepworks

Hope this helped!

Stay safe! <3

Step-by-step explanation:

1) 19+i

2) 9-3i

hope this helps bro

Answer:

1. 19

2. 9 + 11i

Step-by-step explanation:

first problem:

first, we rewrite it and remove the parentheses.

12 - 3i + 7 + 3i

then, just remove the opposites and calculate.

19

second problem:

again, we rewrite and remove the parentheses.

12 + 4i - 3 + 7i

then, we calculate and collect like terms.

9 + 11i

Answer: $200 off is the better option.

Step-by-step explanation: 200 is greater than half of 399.80.

Answer:

The purple coupon

Step-by-step explanation:

so its pretty straightforward

the 50% off of 399.80 is about 200 dollars becuase you can use basic estimation and we know half of 400 is 200 so about 200 dollars and a little less becuase of that 20 cents

The $200 off on a purchase $350 or more is better becuase since its Exactly $200 dollars off so Nancy would’ve saved more since $200 is greater than half of 399,80 which is 199.90.

Answer:

Given - 8 lemons is of $6

To find - Price of 1 lemon

Solution -

8 lemons = $ 6

1 lemon = ?

1 * 6 / 8

6/8

3/4

0.75 $

Answer:

The value is  [tex]P(X = 12) =  0.0356 [/tex]

Step-by-step explanation:

From the question we are told that

   The number of boys in the class is  [tex]b = 12[/tex]

   The number of girls in the class is  [tex]g = 8[/tex]

   The total number of students is  is  n  =  20

    The number of weeks is  N  = 20

The probability of selecting a girl is mathematically represented as

     [tex]p = \frac{8}{20}[/tex]

=> [tex]p = 0.4[/tex]

The probability of not  selecting a girl is mathematically represented as  

     [tex]q = 1- \frac{8}{20}[/tex]

=> [tex]q =0.6[/tex]

Generally the selection of students from the class  follows a binomial distribution  

i.e  

         [tex]X  \~ \ \ \  B(n , p)[/tex]

and the probability distribution function for binomial  distribution is  

      [tex]P(X = x) =  ^{N}C_x *  p^x *  (q)^{n-x}[/tex]

Here C stands for combination hence we are going to be making use of the combination function in our calculators  

Generally the probability that there are exactly 12 weeks in which a girl is selected is mathematically represented as

      [tex]P(X = 12) =  ^{20}C_{12} *  0.4^{12} *  (0.6)^{20-12}[/tex]

      [tex]P(X = 12) =  125970 *  [1.678*10^{-5}]*  0.016796 [/tex]

=>   [tex]P(X = 12) =  0.0356 [/tex]

Answer:

Simplifying

5x + 0(x + y) + -3y + 14 + -3(y + -1x) = 0

Anything times zero is zero.

5x + 0(x + y) + -3y + 14 + -3(y + -1x) = 0

Reorder the terms:

5x + 0 + -3y + 14 + -3(-1x + y) = 0

5x + 0 + -3y + 14 + (-1x * -3 + y * -3) = 0

5x + 0 + -3y + 14 + (3x + -3y) = 0

Reorder the terms:

0 + 14 + 5x + 3x + -3y + -3y = 0

Combine like terms: 0 + 14 = 14

14 + 5x + 3x + -3y + -3y = 0

Combine like terms: 5x + 3x = 8x

14 + 8x + -3y + -3y = 0

Combine like terms: -3y + -3y = -6y

14 + 8x + -6y = 0

Solving

14 + 8x + -6y = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-14' to each side of the equation.

14 + 8x + -14 + -6y = 0 + -14

Reorder the terms:

14 + -14 + 8x + -6y = 0 + -14

Combine like terms: 14 + -14 = 0

0 + 8x + -6y = 0 + -14

8x + -6y = 0 + -14

Combine like terms: 0 + -14 = -14

8x + -6y = -14

Add '6y' to each side of the equation.

8x + -6y + 6y = -14 + 6y

Combine like terms: -6y + 6y = 0

8x + 0 = -14 + 6y

8x = -14 + 6y

Divide each side by '8'.

x = -1.75 + 0.75y

Simplifying

x = -1.75 + 0.75y

Step-by-step explanation:

I'm not sure if the graph or equation answers your question or not sorry if I did it wrong.

Answer:

sss

Step-by-step explanation:

Answer:

afsdcfvvvcxsc

Step-by-step explanation:

Answer:

$23,205

Step-by-step explanation:

dk if it's right but thatts what I got

15%×$27,300 =$409,500

$409,500÷100=$4095

$27,300-$4095

=$23,205

dont trust me doe I might be wrong

Answer:

[tex] y = \frac{z^2 - x}{2} [/tex]

Step-by-step explanation:

Given:

[tex] \sqrt{x + 2y} = z [/tex]

Required:

Solve for y (make y the subject of the formula)

SOLUTION:

[tex] \sqrt{x + 2y} = z [/tex]

Square both sides

[tex] (\sqrt{x + 2y})^2 = z^2 [/tex]

[tex] x + 2y = z^2 [/tex]

Subtract both sides by x

[tex] 2y = z^2 - x [/tex]

Divide both sides by 2

[tex] y = \frac{z^2 - x}{2} [/tex]

It doesn't show?????

Answer:

In 4 days approx. 1527 cars were washed over a 4-day period.

Step-by-step explanation:

To find out how many cars were washed in these 3 washes over 4 days as long as they stay at the same constant number, simply multiply the number of cars each wash washes a day by 4 then add it all together. See below:

145 x 4 = 580

211 x 4 = 211

184 x 4 = 736

580 + 211 + 736 = 1527

So, in 4 days approx. 1527 cars were washed over a 4-day period.

Hope this helps! If you have any additional questions, please don't hesitate to ask me or your teacher to be sure you master the subject. Stay safe and please mark brainliest!

Answer:

B

Step-by-step explanation:

It goes rise over run. So it goes up four squares and to the right five squares.

Answer:

B

Step-by-step explanation:

Answer:

its would be a

Step-by-step explanation:

Answer:

$22.50

Step-by-step explanation:

5 x 6 = 30 slices

30 x 0.75 = $22.5

Answer:

I think 22.5 dollars for the total

Answer:

Is the number of tosses for each coin enough for the sampling distribution of the difference in sample proportions PA-PB to be approximately normal?

b. No, 20 tosses for coin A is enough, but 20 tosses for coin B is not enough.

Step-by-step explanation:

a) Data and Calculations:

The probability of coin A landing tails-side up (PA) = 0.5

Therefore, the probability of coin A landing heads-side up = 0.5 (1 - 0.5)

This is why 20 tosses for coin A is enough, since the sample proportions PA is approximately normal, symmetric, and equally distributed.  There will be equal amounts of 10 tosses (0.5 *20) for either heads-side up or tails-side up.

For coin B, the probability of landing tails-side up (PB) = 0.8

Therefore, the probability of coin B landing heads-side up = 0.2 (1 - 0-.8)

This is why 20 tosses for coin B is not enough, since the sample proportions PB is not approximately normal, symmetric, and equally distributed.  There will be 16 tosses landing tails-side up (0.8*20) and only 4 tosses landing heads-side up (0.2*20).

Answer:

There is no answer for this question.

Step-by-step explanation:

Since 3/5x+2 not equal to 1/3x+2, so, no answer

Answer:

The pair that performs second are Orville and Nancy.

Step-by-step explanation:

Since Jack and Leslie are partners and that they appear before Kelly, it is safe to assume that this pair may come first beforehand in which Orville also comes on before Kelly.  Nancy also appears before Leslie and since each pair has a female and a male, it is safe to assume that Orville and Nancy perform second while Jack and Leslie perform first and Kelly and Marty perform last.

Answer:

6.33 m/s

Step-by-step explanation:

Given that,

The world record for the men’s 10000 meters was 26 minutes 17.53 seconds.

Distance = 10000 m

Time, t = 26 minutes 17.53 seconds = 1577.53 s

We need to find the average speed throughout the race. It is equal to total distance divided by total time taken.

[tex]v=\dfrac{10000\ m}{1577.53\ s}\\\\=6.33\ m/s[/tex]

So, the average speed is 6.33 m/s.

Answer:

356700

Step-by-step explanation:

By calculation using calculator