make X the subject

P/Q = rx²

M/n = 1/x²​

Answer:

10

Step-by-step explanation:

50/10 = 5

Answer:

(1.962 ; 2.578) ;

There is a 95% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.962 ; 2.578);

(1.865 ; 2.675);

There is a 99% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.8646 ; 2.6754)

Step-by-step explanation:

Given the data :

0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 5

Using calculator :

Mean, xbar = 2.27

Standard deviation, s = 1.219

Sample size = 60

Confidence interval :

Xbar ± Margin of error

Margin of Error = Zcritical * s/sqrt(n)

Zcritical at 95% = 1.96

Margin of Error = 1.96 * 1.219/ sqrt(60) = 0.3084

Lower boundary = (2.27 - 0.3084) = 1.962

Upper boundary = (2 27 + 0.3084) = 2.578

(1.962 ; 2.578)

There is a 95% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.962 ; 2.578)

C.) 99% confidence interval :

Xbar ± Margin of error

Margin of Error = Zcritical * s/sqrt(n)

Zcritical at 99% = 2.576

Margin of Error = 2.576 * 1.219/ sqrt(60) = 0.4054

Lower boundary = (2.27 - 0.4054) = 1.8646

Upper boundary = (2.27 + 0.4054) = 2.6754

(1.865 ; 2.675)

There is a 99% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.8646 ; 2.6754)

Answer:

16.5

Step-by-step explanation:

(18-7) = 11

11 x 3 = 33

33 divided by 2 = 16.5

Answer:

[tex]16\frac{1}{2}[/tex]

Step-by-step explanation:

[tex]\frac{3 (18 - 7)}{2} =\frac{3*11}{2}=\frac{33}{2}= 16\frac{1}{2}[/tex]

Answer:

∠1 = 96°

∠2 = 84°

∠3 = 84°

Step-by-step explanation:

∠1 = 96°

∠2 = ∠3

∠1 + 96 + ∠2 + ∠3 = 360°

∠2 = (360 - 96 - 96)/2 = 84°

∠3 = 84°

Answer:

1. [tex]750(0.041) = $30.75[/tex]

2. [tex]90.75 - 55 = 35.75\\\frac{35.75}{55} = 0.65\\[/tex]   65%

3. [tex]13(1.06) = 13.78[/tex]

Please remember to brainlist this answer

Answer:

give them brainliest

Step-by-step explanation:

Answer:

Fourteen more than seven times the quantity of a number minus nine.

Step-by-step explanation:

Answer:

n - 5  = 8

Step-by-step explanation:

5 less than a number = a number subtracted by 5

Answer:

(5.240 ; 8.760)

Step-by-step explanation:

Given :

Sample mean, xbar = 7

Standard deviation, s = 2.29

Sample size, n = 9

95% confidence interval for the population mean :

Confidence interval :

Xbar ± Margin of error

Margin of Error = Tcritical * s/sqrt(n)

Tcritical at 0.05 ; df = 8 = 2.306

Margin of Error = 2.306 * 2.29/sqrt(9)

Margin of Error = 1.760

Lower boundary = (7 - 1.760) = 5.240

Upper boundary = (7 + 1.760) = 8.760

(5.240 ; 8.760)

Answer:

Faye has $3,000 that she is going to deposit into each of the two accounts as shown:

•Account A: 5% simple interest for 5 years

•Account B: will earn $828.84 over 5 years

Assuming Faye does not make any additional deposits nor withdrawals, find t combined amount of her two accounts after 5 years.

Step-by-step explanation:

sub to sir sir bmgo ΔΔ

Answer:

[tex]x=-4+\sqrt{2}[/tex]

[tex]x=-4-\sqrt{2}[/tex]

Step-by-step explanation:

The quadratic formula is an equation that can be used to find the roots of a quadratic equation when one is given the equation in standard form. A quadratic equation in standard form is the following,

[tex]ax^2 +bx + c=0[/tex]

The quadratic formula is the following,

[tex]\frac{(-a)(+-)\sqrt{(x)^2-4(b)(c)}}{2(a)}[/tex]

Substitute in the given coefficients for the following equation,

[tex]2x^2 + 16x + 28 = 0[/tex]

Substitute,

[tex]\frac{-16(+-)\sqrt{(16)^2-4(2)(8)}}{2(2)}[/tex]

Simplify,

[tex]\frac{-16(+-)\sqrt{256-224}}{4}\\\\=\frac{-16(+-)\sqrt{32}}{4}\\\\=\frac{-16(+-)4\sqrt{2}}{4}\\\\=-4(+-)\sqrt{2}[/tex]

The roots of the quadratic equation ([tex]2x^2+16x+28=0[/tex]) are  ([tex]x=-4+\sqrt2[/tex]) and ([tex]x=-4-\sqrt{2}[/tex])

Answer: 4= 2 8=3 12=4

Step-by-step explanation:

We see that 1/4 is the x, so we can multiply 4 by 1/4 which gives us 1 and then we add 1 because the equation has a +1. Now we do the same to the 8, 8(1/4 +1) =3.

Answer:

I think it is 56

Step-by-step explanation:

Answer:

its 3rd one all the best for your test

Answer:

7.5

Step-by-step explanation:

Answer:

there is five way to find that triangle is congruent. they are:

1. SAS axiom

2. SSS axiom

3. AAA axiom

4. ASA axiom

5. RHS axiom

Answer:

y = 15x + 40

Step-by-step explanation:

(-3, -5) and (-2, 10)

First you want to find the slope of the line that passes through these points. To find the slope of the line, we use the slope formula: (y₂ - y₁) / (x₂ - x₁)

Plug in these values:

(10 - (-5)) / (-2 - (-3))

Simplify the parentheses.

= (10 + 5) / (-2 + 3)

= 15 / 1

Simplify the fraction.

15/1

= 15

This is your slope. Plug this value into the standard slope-intercept equation of y = mx + b.

y = 15x + b

To find b, we want to plug in a value that we know is on this line: in this case, I will use the second point (-2, 10). Plug in the x and y values into the x and y of the standard equation.

10 = 15(-2) + b

To find b, multiply the slope and the input of x(-2)

10 = -30 + b

Now, add 30 to both sides to isolate b.

40 = b

Plug this into your standard equation.

y = 15x + 40

This is your equation.

Check this by plugging in the other point you have not checked yet (-3, -5).

y = 15x + 40

-5 = 15(-3) + 40

-5 = -45 + 40

-5 = -5

Your equation is correct.

Hope this helps!

Answer:

slope : -3/2

Y=(0, 9/2)

Step-by-step explanation:

Answer:

its b

Step-by-step explanation:

i toom the test and got it

Answer:

If the length of each side of a triangle is doubled then its perimeter is also doubled.

Answer:

A. 9

Step-by-step explanation:

So, she has 460 beads, and each braclet she makes requires 50 beads.

Therefore we will divide these numbers to get 9.2. This rounds to A. 9.\

Hope I help!

~PumpkinSpice1

Answer:

4 is the answer =)

Answer:

-1 is the remainder

hope it helps

Answer:

-1 is the remainder for this problem.

Step-by-step explanation:

Plato.

Answer:

y = -3x + 3

Step-by-step explanation:

Since the line is parallel, it has the same slope. Plug the point you have into the equation y - y1 = slope (x -x1) to get your answer, which should be y = -3x +3

Hopefully this helps - let me know if you have any questions!

Answer:

C: y = -3x +3

Step-by-step explanation:

Lines that are parallel have the same slope have so the slope of the line in -3, now we have to find the y-intercept, we can do this by substituting -2 for x and 9 for y and solve for b

9 = -3(-2) +b

9 = 6 + b

b = 3

So the line that is parallel to y = -3x -8 and goers through the point (-2,9) is y = -3x + 3 or answer C

Answer:

Y=2x+13

Step-by-step explanation:

'mx' must stay the same in order for the equation to be parallel.

Answer:  n = -1

Step-by-step explanation: distribute 7 to n +4 to get 7n +28 = 21

subtract 28 on both sides, to get 7n= -7 divide by positive 7, and get n=-1

plug it in to check 7(-1+4)=21

-1+4= 3

7(3)= 21

it checks out ^_^

Answer:

Step-by-step explanation:

Given function:

The profit if 750 students are enrolled:

The equation is

Put x=750

p(750)=0.4(750)²-19(750)=$210750

Answer: Q1 10 Q216 Q3 8

Step-by-step explanation:

BECAUSE I THIK THAT IS THE ANSWER