it is desired to estimate the mean number of chocolate chips in a chocolate chip cookie. how many cookies need to be sampled to estimate the true mean number of chocolate chips per cookie to within 2 chocolate chips with 99% confidence. assume that the population standard deviation is 3.7 chocolate chips.

The two numbers that we requires are; y=−3+3√5 or y=−3−3√5

We know that in this question, we are required to obtain the two numbers that multiply to -36 and add up to -6. Now we have to write the problem into a system of simultaneous equations.

Thus;

Let the numbers by x and y

x + y = -6 ---- (1)

xy = -36 ------ (2)

x = -36/y ------ (3)

If we substitute (3) into (1)

-36/y + y = -6

-36 + y^2/y = -6

Multiply through by y

-36 + y^2 = -6y

Forming a proper quadratic;

y^2 + 6y - 36 = 0

Solving the quadratic for y

y=−3+3√5 or y=−3−3√5

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The measure of the line segment AB is  36cm .

In the question ,

it is given that ,

The triangle ABC is a isosceles triangle ,

that means side AB = side BC ,

and the length of base AC = 24 cm .

given the perimeter of the triangle is 96 cm .

So ,

AB + BC + AC = 96

AB + AB + AC = 96       .....because AB = BC

2AB + AC = 96

Substituting the value of AC = 24 cm

2AB + 24 = 96

Subtracting 24 from both the sides , we get

2AB = 96 - 24

2AB = 72

Dividing both sides by 2 ,

we get ,

AB = 72/2 = 36 .

Therefore , The measure of the line segment AB is  36cm .

The given question is incomplete , the complete question is

Isosceles triangle ABC has a perimeter of 96 centimeters. The base of the triangle is Line segment A C and measures 24 centimeters.

What is the measure of Line segment AB ?

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Poncho ha recorrido más trayecto de la carrera de bicicletas, con una fracción de 3/4 del recorrido.

Problema de comparación de fracciones:

Carmen lleva: 3/5 del trayecto

Memo: 4/7

Poncho: 3/4

Jocelyn: 1/2

Una forma de comparar las fracciones es usando un mismo denominador, esto es posible con el Mínimo Común Múltiplo (MCM):

MCM(2,4,5,7) = 2² · 5 · 7 = 140

Fracciones con mismo denominador:

3/5 = (3 · 7 · 4)/(5 · 7 · 4) = 84/140

4/7 = (4 · 5 · 4)/(7 · 5 · 4) = 80/140

3/4 = (3 · 5 · 7)/(4 · 5 · 7) = 105/140

1/2 = (1 · 2 · 5 · 7)/(2 · 2 · 5 · 7) = 70/140

Comparando:

70/140 < 80/140 < 84/140 < 105/140

  1/2     <     4/7  <     3/5    <     3/4

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Let's call the price before the VAT "x".

Then x plus that 20% VAT totals 14400.

The VAT is calculated as 20% of the original price, so 20% of x or 0.20x.

This gives us x + 0.20x = 14400.

Simplifying, we get 1.2x = 14400.

Dividing by 1.2 on both sides, we get x = 14400/1.2 = 12000.

Answer:

£18000

Step-by-step explanation:

[tex]x[/tex] x 80/100=14400

80x=1440000

x=1440000/80

x=£18000

As we know 1 kilometer = 39370.079 inches

and, 8.39 kilometer = 330,315 inches.

Kilometers: - It is a unit of length in the international system of units (SI) equal to one thousand meters. It is now the measurement unit used for expressing distances between geographical places on land in most of the world.

Inches: - It is a unit of length in the British imperial and united states customary system of measurement. It is equal 1/36 yard or 1/12 of a foot.

To convert a kilometer measurement to an inch measurement, multiply the length by the conversion ratio.

Since 01 kilometer = 39,370.07874 inches,

We can use this simple formula to convert:

          inches = kilometers × 39,370.079

Now, according to the question:

inches = 8.39 × 39370.079

inches = 33.315

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The strategies that would eliminate a variable to help solve the system of equations are

B. Multiply the first equation by -2 and add it to the second equation

C. Multiply the first equation by 1/3 and add it to the second equation

D. Multiply the second equation by 3 and add it to the first equation

From the question we are to determine the strategies that would eliminate a variable to help solve the system of equations.

The given system of equations is

12x + 5y = 7

-4x + 10y = -7

To eliminate y,

Multiply the first equation by -2 and add it to the second equation

-2 × [12x + 5y = 7]

-24x - 10y = -14

Now add to the second equation

 -24x - 10y = -14

+ (-4x + 10y = -7

-----------------------------

-28x = -21

To eliminate x

Multiply the first equation by 1/3 and add it to the second equation

1/3 × [12x + 5y = 7

4x + 5/3y = 7/3

Now, add it to the second equation

   4x + 5/3y = 7/3

+ (-4x + 10y = -7

------------------------------

5/3y + 10y = 7/3 + (-7)

Also, to eliminate x

Multiply the second equation by 3 and add it to the first equation

3 × [-4x + 10y = -7

-12x + 30y = -21

Now, add to the first equation

  -12x + 30y = -21

+ (12x + 5y = 7

----------------------------

35y = -14

Hence, the required strategies are the ones explained above.

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a) The sampling proportion's mean value is 0.25. 0.016 is the standard deviation. The form resembles a bell.

b) There is a 10% possibility of getting this number, p=0.27 or more, given a sample proportion, so I wouldn't be surprised.

c) Since there is no chance that the sample fraction of 0.31 will occur, I would be shocked if it did.

Given,

a) The null hypothesis proportion would be the middle of the sampling distribution (p-0.25). So, p=0.25 is the sampling proportion's mean value.

This would be the standard deviation:

σp = √(p (1 - p) / n) = √(0.25 × 0.75/731) = 0.016

The distribution would resemble a binomial distribution, hence the form would be bell-shaped.

b) By calculating the z-value and checking for its probability in the standard normal distribution, we may determine the likelihood of a value p=0.27 in this distribution.

z = (p - π) / σp = (0.27 - 0.25) / 0.016 = 0.02/0.016  = 1.25

p(z > 1.25) = 0.106

There is a 10% probability of achieving this value, p=0.27 or more, for a sample proportion, so I wouldn't be surprised.

c) We repeat the calculation for p=0.31

z = (p - π) / σp = (0.31 - 0.25) / 0.016 = 0.06/0.016  = 5

p(z > 5) = 0.000

I would be astonished to see that value because the probability of this sample fraction occurring at p=0.31 is zero.

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Check the picture below.

Answer:

Exterior angle: 86°

Base angle: 43°

Base angle: 43°

Third angle: 94°

Step-by-step explanation:

First we'll find x, then calculate all the angles.

There is a mark on two of the sides of the triangle. Two sides are the same. This is an isosceles triangle. So that means the base angles are the same also. One is marked 5x - 12, so the other base angle is also 5x - 12.

The marked exterior angle has a special relationship with the two remote interior angles.

If you add the two remote interior angles it equals the exterior angle.

8x-2 = 5x-12 + 5x-12

Combine like terms.

8x - 2 = 10x - 24

Subtract 8x.

-2 = 2x - 24

Add 24.

22 = 2x

Divide by 2.

11 = x

Now we can find all the angles.

The exterior angle is 8x - 2

= 8(11) - 2

= 88 - 2

= 86°

Base angle is 5x - 12

= 5(11) - 12

= 55 - 12

= 43°

The last angle in the triangle is a linear pair with the exterior angle. Or (Also,) the three angles in the triangle add up to 180°.

Angle+43°+43°=180°

Angle + 86 = 180

Angle = 94°

The total cost of your trip to the movie theater is $43.50.

The total cost will be the sum of money spent on ticket and soda and popcorn.

Ticket cost for or cost price of Ticket for:

         5 years old brother = $4.25

          Grandparents = $6.00 × 2 = $ 12.00

           For self= $7.25

Total cost of tickets = $4.25 + $ 12.00 + $ 7.25

                                 = $ 23.50

Total Money spent = Cost of ticket + cost of soda and popcorn

                                = $ 23.50 + $20

                                = $ 43.50

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The minimum number of swaps required to flip the list is 2.

Array : Generally, in the field of applied sciences, knowledge structures called arrays and typically regarded as just arrays, each containing at least one array-index award or key. Arrays are stored so that formulas can use each component's index tuple to determine the placement of that component within the array.

Given an array with values 5, 10, 15, 20,25

swap reverses the array:

25, 10, 15, 20, 5

25, 20, 15, 10, 5

So, for reversing the number of swaps required list is 2 ..

This may be the smallest variation possible.

Hence, the minimum exchange required to achieve list reversal is two.

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The two equations for this system are C = 0.60f + 15 and C = 0.80f + 13.

The number of fish for which the cost is the same is 10 fishes.

The cost of this fish is equal to $21.

In order to write a system of linear equations to model and describe this situation, we would assign variables to the number of fish and the cost of fish respectively, and then translate the word problem into algebraic equation as follows:

Note: 1 dollar is equal to 100 cents.

Since the starter aquarium kit costs $15 plus 60 cents per fish at wet pets, we have:

C = 0.60f + 15     ........equation 1.

Since the starter aquarium kit costs $13 plus 80 cents per fish at gills and frills, we have:

C = 0.80f + 13          ........equation 2.

Next, we would solve the system of equations as follows:

0.80f + 13 = 0.60f + 15

0.80f -0.60f = 15 - 13

0.20f = 2

Number of fish, f = 2/0.20

Number of fish, f = 10 fishes.

From equation 1, we have:

Cost of fish, C = 0.60f + 15

Cost of fish, C = 0.60(10) + 15

Cost of fish, C = 6 + 15

Cost of fish, C = 21 dollars.

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Converting the given equations from standard form to slope intercept form gives

Information given in the question include

-2x+3y=-6

Standard form of linear equations is of the form Ax + By = C

The slope intercept form is y = mx + c

rearranging the equation

-2x + 3y = -6

3y = 2x - 6

y = 2x/3 - 2

The equation of the line in slope intercept form is y = 2x/3 - 2

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The function that represents the relationship is y = 40x

The total area that he painted = 200 square feet

Time is between 8 am and 1 pm

Then the time taken = 5  hours

The relationship is given by the area a person can paint varies directly with the amount of time he works

Here we have to apply the unitary method

The area that he painted in one hour = 200 / 5

= 40 square feet

Consider the y is the total area that he painted and x is the number of hours

Then the function will be

y = 40x

Hence, the function that represents the relationship is y = 40x

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a) The graph of f(x) is as shown below.

b)

The domain of f(x) is: [-4, 4]

The range of function f(x) is [-2, 6]  

In this question we have been given a piecewise function [tex]f(x)=\left \{ {{\frac{-(x+2)}{2} ~~~-4\leq x\leq 2} \atop {4x-10}~~~~2 < x\leq 4} \right.[/tex]

We need to graph the given function.

The table of (x, f(x)) values is as shown below.

  x             f(x)

 -2             0

 -4              1

  0             -1

  2             -2

 2.5           0

  3.5          4

  4             6

The graph of f(x) is as shown below.

The domain of f(x) is: [-4, 4]

The range of function f(x) is [-2, 6]          

Therefore, for given piecewise function,

a) The graph of f(x) is as shown below.

b)

The domain of f(x) is: [-4, 4]

The range of function f(x) is [-2, 6]  

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Check the picture below.

if the segment AD is an angle bisector, that means it makes two twin angles, and let's also keep in mind that the side AG is shared by both triangles, so is not shorter or longer for either, is the same for both, which means Andrea rules!!!

Answer:

If you use y = mx + b, your equation would be y = -4x + 20

Step-by-step explanation:

M is always the slope, and to find the x-intercept, you just set y = 0 and in this case it would be 0 = -4x + 20. If you subtract 20 from both sides you get -20 = -4x and to find x, you just divide by -4 and get -20/-4, which equals 5. You're welcome :)

We need to determine the value of the y-intercept for this equation. Let's start by finding all other information about the x-intercept.

If the x-intercept is x = 5, f(5) = 0. So, now let's solve for b.

f(5) = -4(5) + b
0 = -4(5) + b
0 = -20 + b
0 + 20 = -20 + 20 + b
b = 20

We have m and b now, so:

y = -4x + 20

In the equation y= 17x + 8 ,

the value of x = (1,25) ,(2,42) ,(3,59) ,(4,76).

Given that,

           y= 17x + 8

When x = 1

y = 17 × 1 + 8 = 25

when x=2,

y = 17 × 2 + 8 = 42

When X=3,

y = 17 × 3+ 8 = 59

when X=4

y = 17 × 4+ 8 ]= 76

Therefore, the required solution is :

x = (1,25) ,(2,42) ,(3,59) ,(4,76).

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Answer: 10

Step-by-step explanation:

Set the equal angles as x, as shown below.

Then, [tex]sin(x)=\frac{x+4}{8}[/tex] and [tex]sin(x)=\frac{2x+1}{12}[/tex]. Set them equal to each other and solve for x:

[tex]\frac{x+4}{8} =\frac{2x+1}{12} \\ \\12(x+4)=8(2x+1)\\12x+48=16x+8\\48-8=16x-12x\\4x=40\\x=10[/tex]

This is assuming those two triangles are right triangles. I'm actually not sure if they're right triangles.

The probability that a car buyer bought an alarm system or bucket seats is 0.50.

Probability of ,

Alarm system p(A) = 40/100 = 0.40

Bucket seat p(B) = 30/100 = 0.30

Alarm system and bucket seat p(A and B) = 20/100 = 0.20

Probability of alarm system or bucket seat is :

= p(A)+p(B)-p(A and B)

= 0.40+0.30-0.20

= 0.50

In mathematics, probability is the likelihood of an event occurring. It is quantified as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty. The higher the probability of an event, the more likely it is to occur. A simple example is the tossing of a coin, where the probability of either head or tail is 1/2.

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There is a modest rise in arrival rates as compared to the prior arrival because the value is bigger than 0.05. It is a minuscule rise.

Given that,

The Message is arrive at an electronic mall server at the average

rate is 4 messages for every 5 minutes. Then the average

number of message is said to be a and mean is 4 to 5 interval.

Therefore ,we can use poission's approximation  to binomial  distribution in this case,

λ=4/5 min

( a ) Then , The Number of messages arrived in 1 hour

4x 12 = 48 . , So 48 messages per hour.

Now , our New arrival rate of messages , λ =48

By using possion's distribution ,

θ = time/rate

= 60/48= 1.25

NOW

probability density function of X is given as

f (x ) = θ e^-θx

for X>0

Given , the probability of new message arrival during given frame

equal is 0.05

p (X > x ) = 0.05

Now , of θ ∫e^-θx dx  = 0. 05 .

then, e^-θx =0.05

Apply logarithm on both sides , then

In( e^-θx) = In 0.05

By solving,

1- 25

X = 2. 39658

(b) Now , probability of arrival of 50 messages in 60 minutes

p (X>2.39658 ) = 0.05

Now arrival gap is θ = 60/50 = 1.2

P(x> 2.39658 ) =e^-θx

=e^- 1- 2 * 2.39658 = 0.0564

NOW ,

p(x>2- 39658) = 0.0564.

It is greater than 0.05 , so it is called there is slight increase in arrival rates as compared to the previous arrival. It is very small increase .

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The area of an L-shaped room is calculated by cutting off the Leg of the L and finding the area of the rectangles separately.

Area of the floor space occupied by an objected which is measured in unit squares.

A rectangle is an object which is bounded by four sides, four vertices

The area (A) of a rectangle is;

A=Length x Width

The Area of the L-shaped room is calculated by

A = Area of the Vertical rectangle + Area of the Leg

A = LW + lw

where

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Answer:

It's D.

Step-by-step explanation:

I know I can't see that option, but it's D. If you use A for the first one, you get 4(-4) which is -16 and you add 3 to that, it's -12, so that's not 2 so it can't be A. If you use B for the first one, you get 2(-4) which is -8, and if you add 3, you get -5, not 2, so it can't be that either. If you use C, you get 0.5(-4) which is -2, and if you add 3 to that, you just get 1, so it can't be C either. I assume there is fourth option, so it's D.

The function will return the data type double.

Simply put, a function is a "chunk" of code that you can reuse repeatedly rather than having to write it out several times. Programmers can divide a problem into smaller, more manageable chunks, each of which can carry out a specific task, using functions.

Function declaration type will be as follows in general,

return type function name(argument 1, argument 2,...)

In the given question the declaration is double numbers (int x).

The return type is double, the name of the function is numbers and it has one argument which in an integer.

Hence, the return type of the function is double.

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Answer:5.76

Step-by-step explanation:

-2 2/5=-2.4

(-2.4)^2=5.76

The dimensions of the rectangle are either 10cm x 24cm or

24cm x 10cm having perimeter 68 cm.

What is Pythagorean theorem?

Pythagoras theorem states that “In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares of the other two sides“.

A rectangle has 4 angles measure of each is 90°.

A diagonal of rectangle divides it into two right angled triangles.

Pythagorean theorem can be applied on these triangles to get the desired values.

According to the given question:  

Let the length and breadth of rectangle be  x  and  y .

Perimeter:  2x + 2y = 68 (Given)

Using Pythagorean theorem diagonal:  [tex]x^2+y^2=26^2[/tex]

Using perimeter,  x + y = 34

∴ x = 34 - y

Substituting this is the equation for diagonal

[tex](34-y)^2 +y^2=26^2\\1156 - 68y + 2y^2 = 676\\2y^2 - 68y + 480 = 0\\y^2 - 34y + 240 = 0\\(y - 10)(y - 24) = 0[/tex]

Therefore dimensions of rectangle are either 10cm x 24cm or

24cm x 10cm.

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Answer:

X = -3, y = -8

Please see the link to view the Graph:

Answer:

No because their ratios are not the same

Step-by-step explanation:

The scalar from 5 to 10 is 2 but from 3 to 4, its 4/3.