what is the answer to this

The statement, When two events are disjoint, they are also independent is false.

In a sample space, we can use probability laws to determine the probabilities of these events and how they relate to each other. Disjoint Events: Two events are non-overlapping or mutually exclusive if they have no common outcome. Mathematically, this can be written as, P(B ∩ A) = 0 --(1)

Independent Events: Events are independent when they do not "affect" the probability of another event occurring. Mathematically written as:

P(B/A) = P(B) P(A and B)

=> P(B ∩ A) = P(B) × P(A) --(2)

(1) ) and (2) events cannot be independent unless they overlap. That is, if events do not overlap, they are also dependent. Hence, disjoint events are not independent that means the above statement is false.

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Answer:B

Step-by-step explanation:

-7+5.25n-4.5n=-7+0.75n

The expression that will help to find the area of the given shaded region is 3x²+27x+51.

Area is a measure of the amount of space inside a two-dimensional shape or surface. It is usually expressed in square units, such as square inches, square feet, or square meters. The area of a shape can be calculated by multiplying its length by its width, or by using a specific formula for that shape. For example, the area of a rectangle is found by multiplying its length and width, while the area of a circle is found by multiplying the square of its radius by pi (3.14). Area is an important concept in mathematics, and it is used in many real-world applications such as calculating the amount of paint needed to cover a wall, or the amount of land needed to build a house.

Here,

area of rectangle=(x+10)(2x+5)

area of square=(x+1)²

area of shaded region=area of rectangle-area of square

=(x+10)(2x+5)-(x+1)²

=2x²+20x+5x+50+x²+2x+1

=3x²+27x+51

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The general solution for the non-homogeneous equation is the sum of the homogeneous solution and the particular solution::

y(x) = c1 * cos(√-17i * x) + c2 * sin(√-17i * x) + (3/64) * e^8x

where c1 and c2 are arbitrary constants.

The method of undetermined coefficients is used to find a particular solution for a non-homogeneous linear ordinary differential equation of the form:

dy/dx + p(x)y = g(x)

where p(x) and g(x) are known functions. To use this method, we first find the general solution of the corresponding homogeneous equation:

dy/dx + p(x)y = 0

The general solution of this homogeneous equation can be written as:

y = c1 * y1(x) + c2 * y2(x)

where c1 and c2 are arbitrary constants and y1(x) and y2(x) are the linearly independent solutions of the homogeneous equation.

Next, we guess a particular solution yp of the non-homogeneous equation of the form:

yp = A * f(x)

where A is an unknown constant and f(x) is a function of x that matches the form of the forcing function g(x).

For the given equation: y'' + 17y = 3e^8x

The corresponding homogeneous equation is: y'' + 17y = 0

The characteristic equation is: r^2 + 17 = 0

The roots are: r = ±√-17i

So the general solution of the homogeneous equation is:

y = c1 * cos(√-17i * x) + c2 * sin(√-17i * x)

where c1 and c2 are arbitrary constants.

For the non-homogeneous equation, we guess a particular solution of the form:

yp = A * e^8x

where A is an unknown constant. Substituting this into the non-homogeneous equation, we have:

yp'' + 17yp = A * 8^2 * e^8x = A * 64e^8x

Comparing the right-hand sides of the two equations, we see that yp'' + 17yp = A * 64e^8x = 3e^8x, so A = 3/64.

Therefore, a particular solution for the non-homogeneous equation is:

y = yp = (3/64) * e^8x

The general solution for the non-homogeneous equation is the sum of the homogeneous solution and the particular solution:

y = c1 * cos(√-17i * x) + c2 * sin(√-17i * x) + (3/64) * e^8x

where c1 and c2 are arbitrary constants.

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The total number of students in the science club will be 50. The correct option is C.

The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.

If 10 students represent 20% of the total number of students in the Science Club, then 10 / 0.2 = 50 students is the total number.

Therefore, The total number of students in the science club will be 50. Then the correct option is C

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The angle ∠1 is 55 degrees.

A triangle is a three-sided polygon that consists of three edges and three vertices.

Given that  diagram shows an example of the Pratt truss used in bridge

construction.

We need to find the angle ∠1.

The given triangle is a right angle triangle which has one angle 90 degrees.

The adjacent angle to 145 degrees be angle 2.

145+∠2=180

∠2=180-145

∠2=35 degrees.

We know that the sum of three angles is 180 degrees

So ∠1+35+90=180

∠1+125=180

Subtract 125 from both sides

∠1=180-125

∠1=55

Hence, the measure ∠1 is 55 degrees.

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The functions y = 2 (1/5)^(x) - 5 and y = 2^x are compared as follows

                                 y = 2 (1/5)^x - 5                y = 2^x

Starting value:               2                                    1

base function:        decay function = 1/5         growth function = 2

Transformation:     translation: 5 units down  no transformation

A decay function is a mathematical function that models the decrease or diminution of a value over time and is used in many disciplines including physics, engineering, economics, and machine learning.

It is a sort of function that, as time goes on, approaches zero at a pace proportionate to its current value.

The base function for decay functions is an exponential function, is

0 < k < 1

The growth function, which has values greater than 1, is the reverse of the decay function.

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The formula for calculating percent recovery is

Percent recovery = (mass of purified compound obtained / mass of original compound) x 100

Percent recovery is an important parameter used in recrystallization to determine the efficiency of a purification process. It refers to the percentage of the original material that is recovered after the recrystallization process.

To calculate percent recovery, first, the mass of the original sample is measured before the recrystallization process. After the process is completed, the mass of the purified compound is measured, which is obtained from the recrystallization.

The mass of the purified compound is then divided by the mass of the original compound and multiplied by 100 to get the percent recovery. A high percent recovery indicates that the recrystallization process was successful in separating the target compound from the impurities, and the final product is relatively pure.

A low percent recovery may indicate that the recrystallization process was not efficient in separating the target compound from impurities, or that some of the target compound was lost during the process. Thus, percent recovery is a crucial parameter that determines the success of a recrystallization process.

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Complete question is:

How do you calculate percent recovery during recrystallization?

The point (-2, 1) satisfies both equations y = x + 3 and y = 2x + 5 simultaneously.

What is graph of equation?

Write the equation in the form y = mx + b to determine the slope m and y-intercept (0, b). 2) Next, determine the y-intercept. 3) Depending on whether the slope is positive or negative, go up or down and left or right from the y-intercept.

We are looking for the values of x and y that satisfy both equations simultaneously. We can do this by setting the right-hand sides of the two equations equal to each other:

y = x + 3 (equation 1)

y = 2x + 5 (equation 2)

Setting the right-hand sides equal to each other, we get:

x + 3 = 2x + 5

Simplifying this equation, we get:

x = -2

Now that we have the value of x, we can substitute it into either of the two equations to find the corresponding value of y. Let's use equation 1:

y = x + 3

y = -2 + 3

y = 1

So, the values of x and y that make both equations true are:

x = -2

y = 1

Therefore, the point (-2, 1) satisfies both equations y = x + 3 and y = 2x + 5 simultaneously.

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Answer:

6x-7=3x-29

6x-3x=-29+7

3x=-23

x=-23/3

6x-7=8y+17

6(-23/3)-7=8y+17

-46-7=8y+17

8y+17+53=0

y=70/8

Y=8.75

ANS!!

The equations equivalent to the given equation 3x - 4 = 5 are A) 3x = 9, B) 3x - 4 + 4 = 5 + 4 and E) -4 = 5 - 3x.

An equation is defined as a mathematical statement containing two expressions on either sides which are connected with an equal to sign.

Either sides of an equation are called as left hand side and right hand side.

Given equation is 3x - 4 = 5.

Adding the number 4 on both sides, we get,

3x - 4 + 4 = 5 + 4, which is the equation B.

Simplifying,

3x = 9, which is the equation A.

x = 3

3x - 4 = 5

Subtracting 3x on both sides of the equation,

3x - 4 - 3x = 5 - 3x

-4 = 5 - 3x, which is the equation E.

Hence the equivalent equations are A, B and E.

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Your question is incomplete. Probably the correct question is as follows.

Select ALL the equations that are equivalent to the equation 3x - 4 = 5.

A) 3x = 9

B) 3x - 4 + 4 = 5 + 4

C) x - 4 = 2

D) x = 9

E) -4 = 5 - 3x

The number of signature on the petition in the first week is 6

A double is a number or an amount that is twice as large as the given number or amount. So, if we multiply a number by 2 or if we add a number to itself, we say that the number is doubled.

Since the signature doubles every week

represent the initial signature by x

p(o) = x

second week =2 x

third week =4 x

fourth week = 8x

fifth week =16 x

sixth week = 32x

32x = 192

x = 192/32

x = 6

therefore the number of signature on the petition in the first week is 6

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The number of cubes that have just one red face is 25.

A solid three-dimensional shape called a cube contains six square faces, eight vertices, and twelve edges.

Given:

Meg paints the whole outside of a 5 x 5 x 5 cube red and then cuts it up into 1 x 1 x 1 cube.

The surface area of the cube with dimensions 5 x 5 x 5,

= 6 x 5 x 5

= 150 square units.

The surface area of the cube with dimensions 1 x 1 x 1,

= 6 square units.

The number of cubes that have just one red face is,

= 150/6 = 25

Therefore, 25 is the required number.

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Answer:

Each person will receive 12 ounces

Step-by-step explanation:

84 ounces divided by 7 people

84 / 7 = 12

The price of the sweater after the discount is 0.72P.

A reduction made from the gross (see gross entry 1 sense 3b) amount or value of something.

Since the price P would represent 100% and the price was discounted by 10%, you can calculate 10% of 100% and subtract that amount, which would be:

100× 10%=10

100-10=90%

The price paid would be 90% of P.

Then, the statement says that the price was discounted by another 20%. Now let us calculate 20% of the price and subtract that amount from the price:

90×20%=18

90-18=72%

Hence, the price of the sweater after the discount is 0.72P.

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The remaining time of the trip is 3 5/6 hours.

If a trip from Boston to Washington takes 5 3/4 hours and you have traveled 1/3 of the way, the remaining time of the trip can be calculated by subtracting the time traveled from the total time of the trip.

First, we need to convert 5 3/4 hours to a fraction:
5 3/4 = (5 * 4 + 3)/4 = 23/4
Next, we need to calculate the time traveled so far:
23/4 * 1/3 = 23/12
Now we can subtract the time traveled from the total time of the trip:
23/4 - 23/12 = (23 * 3 - 23 * 1)/12 = 46/12 = 3 10/12 = 3 5/6
Therefore, the remaining time of the trip is 3 5/6 hours.
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The amount of money that he earned in interest is given as follows:

$420.

The balance of an account after t years, using simple interest, that is, a single compounding per year, is given by the equation presented as follows:

A(t) = P(1 + rt).

In which the parameters of the equation are explained as follows:

P is the value of the initial deposit.

r is the interest rate, as a decimal.

The interest accrued is given as follows:

I(t) = Prt.

The parameters for this problem are given as follows:

P = 7000, r = 0.02, t = 3.

Hence the total interest is of:

I(3) = 7000 x 0.02 x 3

I(3) = $420.

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The time taken by Linda to cover 693 miles is 11 hours.

Rate of change is the speed at which the variables changes with respect to time.

In 9 hours Linda drove 567 miles.

Miles travelled in 1 hour is,

[tex]speed=\frac{distance covered}{timetaken}[/tex]------(1)

         =[tex]\frac{567}{9}[/tex]

         = 63 miles per hour.

Linda drove 63 miles per hour.

She is travel in the same rate from the beginning.

Let  t be the time taken by her to travel 693 miles is,

By using (1),

[tex]speed=\frac{distance covered}{timetaken}[/tex]

[tex]t=\frac{693}{63}[/tex]

⇒t=11 hours.

Hence, the time taken by Linda to cover 693 miles is 11 hours.

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Micaela paid the amount of $63.8 in the end for a concert ticket.

Subtract the final price from the original price then Divide this number by the original price. Finally, multiply the result by 100. You've obtained a discount in percentages.

Reformulate the basic equation to:

% discount = 100 × (original price - discounted price) / original price

To calculate the final price that Micaela paid, we need to apply the discount and the processing fee to the original price of the ticket.

The discount is 20% of the original price of $76, which is:

discount = 0.2 x $76 = $15.20

So Micaela paid:

price after discount = $76 - $15.20 = $60.80

Now we need to apply the processing fee. The processing fee is 5% of the price after the discount, which is:

processing fee = 0.05 x $60.80 = $3.04

So the final price that Micaela paid is:

final price = $60.80 + $3.04 = $63.84

Therefore, she paid $63.8 in the end, rounded to the nearest cent.

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Answer:

Division

7n=21

7n÷7=21÷7

n=3

Step-by-step explanation:

Answer:

the answer is 3

Step-by-step explanation:

7n=21

divide both sides by 7

n=3

Answer: B: x ≥ -6

hope this helps

Ayana is 6/5 times as tall as Chike.

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

Given that;

Height of Ayana = 1 1/2 meter

And, Height of Chike = 1 1/4 meter

Now, We can simply solve the above problem as follows;

Height of Ayana = 1(1/2) meters

We can also write it as;

= 3/2 meters

And, Height of Chike = 5/4 meters

Hence, To compare the given fractions we will first make the denominator equal by taking the LCM.

LCM of 2 and 4 = 8

Hence, Heights of Ayana can be rewritten as, 12/8 meters

And, Height of Chike can be rewritten as, 10/8

Now, Comparing the height of Ayana and Chike as;

= (12/8) ÷ (10/8)

= 12/10

= 6/5

Hence, Ayana is 6/5 times as tall as Chike.

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Complete question is this,

Ayana is 1(1/2) meters tall. Chike is 1(1/4) meters tall. Complete the comparison.

Ayana is ____ times as tall as chike.

The triangles ∆ABC and ∆DEF are similar triangles, and ∆ABC ≅ ∆DEF. The values of x and y are 30.6 and 30° respectively.

Similar triangles are two triangles that have the same shape, but not necessarily the same size. This means that corresponding angles of the two triangles are equal, and corresponding sides are in proportion.

We have that line AC of the triangle ∆ABC corresponds to line BK of the triangle ∆DEF and also angle A of the triangle ∆ABC corresponds to angle D of the triangle ∆DEF.

We can evaluate for the values of x and y as follows:

2y - 5 = 65

2y = 65 - 5 {subtract 5 from both sides}

2y = 60

y = 60/2 {divide through by 2}

y = 30

2x + y = 90.6

2x + 30 = 90.6

2x = 90.6 - 30 {subtract 30 from both sides}

2x = 60.6

x = 60.6/2 {divide through by 2}

x = 30.3

In conclusion, the triangles ∆ABC and ∆DEF are similar triangles, and ∆ABC ≅ ∆BMK. The values of x and y are 30.6 and 30° respectively.

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Yes, it is True that The sensitivity range for an objective function coefficient (range of optimality) is the range of values over which the current optimal solution point (product mix) will remain optimal.

The sensitivity range for an objective function coefficient, also known as the range of optimality, is the range of values over which the current optimal solution (product mix) will remain optimal. This range represents the tolerance for changes in the objective function coefficients without causing the optimal solution to change.

The range of optimality is determined by analyzing the linear programming model and checking how changes in the objective function coefficients affect the optimal solution. If a change in an objective function coefficient falls within the sensitivity range, it means that the current optimal solution will still be optimal, even with the change. However, if the change falls outside the sensitivity range, it will cause the optimal solution to change.

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Answer: x,2

Step-by-step explanation:

Answer:

7 x x + 7 x 2

Step-by-step explanation:

7(x + 2)

7x + 7(2)

7x + 14

Answer:

To multiply 0.12 x 0.4, first you need to write the numbers in standard form. 0.12 can be written as 0.120 and 0.4 can be written as 0.400.

Then, multiply the numbers by first multiplying the digits in the ones column, then the digits in the tenths column and finally the digits in the hundredths column.

This is done by multiplying the first digit in the first number (1) with the first digit in the second number (4), then multiplying the second digit (2) with the second digit (0), and finally multiplying the third digit (0) with the third digit (0).

Therefore, the multiplication can be written as:

1 x 4 = 4 2 x 0 = 0 0 x 0 = 0

Adding these three numbers together gives us 0.048, which is the answer to 0.12 x 0.4.

From the information given, 168 cm is approximately equal to 5 feet and 6.14 inches (rounded to two decimal places).

To convert centimeters to feet and inches, you can use the following conversion factors:

1 inch = 2.54 cm

1 foot = 12 inches

First, convert the length in centimeters to inches by dividing by 2.54:

168 cm ÷ 2.54 cm/inch = 66.14 inches

Next, convert the total number of inches to feet and inches. To do this, divide the total number of inches by 12 to get the number of whole feet, and then use the remainder as the number of inches.

66.14 inches ÷ 12 inches/foot = 5 feet with a remainder of 6.14 inches

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