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Answer:

1)

P(X = 0) = 0.125

P(X = 1) = 0.375

P(X = 2) = 0.375

P(X = 3) = 0.125

2)

E(X) = 1.5

Step-by-step explanation:

For each coin, there are only two possible outcomes. Either it is heads, or it is tails. The probability of a toss being heads or tails is independent of any other toss. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

\(P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}\)

In which \(C_{n,x}\) is the number of different combinations of x objects from a set of n elements, given by the following formula.

\(C_{n,x} = \frac{n!}{x!(n-x)!}\)

And p is the probability of X happening.

The expected value of the binomial distribution is \(E(X) = np\).

A fair coin is flipped 3 times.

Fair means that it is equally as likely to be heads or tails, so \(p = 0.5\).

3 times means that \(n = 3\)

(1) Find the pmf for X;

Probability of each outcome. So

\(P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}\)

\(P(X = 0) = C_{3,0}.(0.5)^{0}.(0.5)^{3} = 0.125\)

\(P(X = 1) = C_{3,1}.(0.5)^{1}.(0.5)^{2} = 0.375\)

\(P(X = 2) = C_{3,2}.(0.5)^{2}.(0.5)^{1} = 0.375\)

\(P(X = 3) = C_{3,3}.(0.5)^{3}.(0.5)^{0} = 0.125\)

(2) calculate the expected value of X.

\(E(X) = np = 3*0.5 = 1.5\)

There were 5 1/4 bags of popcorn left after eating 4 bags.

To find out how much popcorn was left after eating 4 bags, we need to subtract the amount eaten from the total amount Brianna made.

Brianna made 9 1/4 bags of popcorn, which can be represented as a mixed number. To perform calculations, let's convert it to an improper fraction:

9 1/4 = (4 * 9 + 1) / 4 = 37/4

Now, let's subtract the 4 bags eaten from the total:

37/4 - 4

To subtract fractions, we need a common denominator. The common denominator of 4 and 1 is 4. Therefore, we can rewrite the expression as:

37/4 - 4/1

Now, let's find a common denominator and subtract the fractions:

37/4 - 16/4 = (37 - 16) / 4 = 21/4

The result is 21/4, which is an improper fraction. Let's convert it back to a mixed number:

21/4 = 5 1/4

Therefore, there were 5 1/4 bags of popcorn left after eating 4 bags.

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Answer:

\(Rate = 0.2167\ fl\ oz/hour\)

Step-by-step explanation:

Given

\(Rate = \frac{91\ fl\ oz}{2.5\ weeks}\)

Required

Express the rate as per hour

\(Rate = \frac{91\ fl\ oz}{2.5\ weeks}\)

There are 168 hours in  a week;

So, the rate becomes

\(Rate = \frac{91\ fl\ oz}{2.5 * 168\ hours}\)

\(Rate = \frac{91\ fl\ oz}{420\ hours}\)

\(Rate = 0.2167\ fl\ oz/hour\)

Hence;

The equivalent of the given rate is \(0.2167\ fl\ oz/hour\)

Answer:

22

Step-by-step explanation:

4x11x1/2=22

I really hope this helps

The rational function graphed in this problem is defined as follows:

y = -2(x - 1)/(x² - x - 2).

The vertical asymptotes of the rational function for this problem are given as follows:

x = -1 and x = 2.

Hence the denominator of the function is given as follows:

(x + 1)(x - 2) = x² - x - 2.

The intercept of the function is given as follows:

x = 1.

Hence the numerator of the function is given as follows:

a(x - 1)

In which a is the leading coefficient.

Hence:

y = a(x - 1)/(x² - x - 2).

When x = 0, y = -1, hence the leading coefficient a is obtained as follows:

-1 = a/2

a = -2.

Thus the function is given as follows:

y = -2(x - 1)/(x² - x - 2).

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Answer:

x=4

Step-by-step explanation:

5+3x=17

-5        -5

3x=12

3       3

x=4

Answer:

x = 4

Step-by-step explanation:

\(5+3x=17\\\\3x=12\\\\x=4\)

Answer:

a

Step-by-step explanation:

conditional equation I this this will help you ♥️

Using implicit differentiation dy/dx = -(2x + y)/(x + 2y) and d2y/dx² = -2(x² - 3xy - y²)/(x + 2y)³.

Implicit differentiation is the process of differentiating an equation in which it is not easy or possible to express y explicitly in terms of x.

Given the equation x² + xy + y² = 5,

we can differentiate both sides with respect to x using the chain rule as follows:

2x + (x(dy/dx) + y) + 2y(dy/dx) = 0

Simplifying this equation yields:

(x + 2y)dy/dx = -(2x + y)

Hence, dy/dx = -(2x + y)/(x + 2y)

Next, we need to find d^2y/dx^2 by differentiating the expression for dy/dx obtained above with respect to x, using the quotient rule.

That is:

d/dx(dy/dx) = d/dx[-(2x + y)/(x + 2y)](x + 2y)d^2y/dx² - (2x + y)(d/dx(x + 2y))

= -(2x + y)(d/dx(x + 2y)) + (x + 2y)(d/dx(2x + y))

Simplifying this equation yields:

d2y/dx² = -2(x² - 3xy - y²)/(x + 2y)³

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Answer:

Step-by-step explanation:

   given equuation      10\(\sqrt{3x\)+4\(\sqrt{3x\)+5\(\sqrt{3x}\)

                                    =19\(\sqrt{3x}\)

the answer is 19\(\sqrt{3x}\)

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Answer: 1/56

Step-by-step explanation:

Since the box has 8 different colors, the probability of picking any color of crayon will be 1/8.

This question relates to a probability without replacement, therefore, the probability of picking the red crayon first will be 1/8. After then, there'll be 7 crayons left and the probability of picking the green crayon next will be 1/7.

Therefore, the probability that I will remove the Red and the Green crayon from the box will be:

= 1/8 × 1/7

= 1/56

This triangle is not possible.

A triangular field has sides of lengths 29, 35, and 51 miles. The largest angle of the triangle can be calculated using the Law of Cosines, which is a generalization of the Pythagorean Theorem.

Law of Cosines:The Law of Cosines is a mathematical tool used to calculate the length of a side or the size of an angle of a non-right triangle. It states that the square of any side of a triangle is equal to the sum of the squares of the other two sides,

minus twice the product of these two sides and the cosine of the angle between them.Mathematically, the law of cosines is expressed as: `a^2 = b^2 + c^2 - 2bc cos A`,

where `a` is the unknown side, and `b` and `c` are the known sides of the triangle, and `A` is the angle between sides `b` and `c`.We can use the Law of Cosines to find the largest angle in the triangle as follows:Let `A` be the largest angle,

which is opposite the longest side `51 mi`.Using the Law of Cosines, we have:`

a^2 = b^2 + c^2 - 2bc cos A``51^2 = 29^2 + 35^2 - 2(29)(35) cos A``2601 = 1681 + 1225 - 2030 cos A``2030 cos A = 1225 + 920``cos A = (1225 + 920)/2030``cos A = 2145/2030``cos A ≈ 1.057139``A = cos^-1 (1.057139)`

Since the cosine function is only defined for values between -1 and 1, `1.057139` is not a valid value for `cos A`.

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Answer:

Step-by-step explanation:

The missing angle of the triangle is 180°-42°-60° = 78°.

x° =  180°-78° = 102°

Answer:

Amir and ryan would qualifiey

Step-by-step explanation:

The answer of the given question based on finding the values of a and b are 12 and 9, respectively.

A triangle is  geometric shape that consists of the three straight sides and three angles. Triangles are one of  basic shapes in geometry and often used in the various mathematical applications.

Since  triangles are similar, their corresponding sides are in the proportion. That is:

AB/DE = BC/EF = AC/DF

We can use this proportion to find the values of a and b.

From the diagram, we can see that:

AB = 12 + a

BC = 9 + b

AC = 15

DE = 8

EF = 6

Using the proportion, we get:

AB/DE = BC/EF

(12 + a)/8 = (9 + b)/6

Cross-multiplying, we get:

6(12 + a) = 8(9 + b)

72 + 6a = 72 + 8b

6a = 8b

a/b = 4/3

Similarly, using the other part of the proportion, we get:

AC/DF = 15/DF = (AB + BC)/(DE + EF) = (12 + a + 9 + b)/(8 + 6)

15DF = 21 + a + b

Substituting the value of a/b = 4/3, we get:

15DF = 21 + (4/3)b + b

15DF = 21 + (7/3)b

45DF = 63 + 7b

45DF = 7(b + 9)

Dividing both sides by 7, we get:

DF = (b + 9)

Substituting this value in the previous equation, we get:

45(b + 9) = 63 + 7b

45b + 405 = 63 + 7b

38b = 342

b = 9

Substituting the value of b in the equation a/b = 4/3, we get:

a/9 = 4/3

a = 12

Therefore, the values of a and b are 12 and 9, respectively.

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Answer:

189

Step-by-step explanation:

(13.5 / 100) 1400 = 189

yw ;)

Answer:

I think its C

Step-by-step explanation:

One way Olivia might have moved ABCDE onto A"B"C"D"E" is by first reflecting ABCDE over the x-axis, and then translating it 4 units to the left and 6 units down.

1) This would map point A to A", B to B", C to C", D to D", and E to E", creating A"B"C"D"E".

2) Angelica's transformation does not result in a figure that matches A"B"C"D"E". Reflecting ABCDE over the y-axis would map point A to A", B to E", C to D", D to C", and E to B", so the shape would be flipped horizontally. Translating it up 8 units would then shift the shape up, but it would still be horizontally flipped, so it would not match A"B"C"D"E".

3) Michael's claim is not correct. Translating ABCDE diagonally 8 units up and 10 units right would move point A to point J, which is not on A"B"C"D"E". The other points would also not be in their correct positions, so the resulting shape would not match A"B"C"D"E". To get to A"B"C"D"E" with one transformation, Michael would need to use a combination of translation, rotation, and/or reflection.

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Answer:

Step-by-step explanation:

3/4x3=9/4

Answer:

2 1/4

Step-by-step explanation:

3/4+3/4=1 2/4

1 2/4+3/4=2 1/4

Answer:

Step-by-step explanation:

1st 10 days - 8 GB

2nd 10 days - 8 GB

3rd 10 days - 8 GB

________________

30 days    -  24 GB

Answer: c = 7

Step-by-step explanation:

180 = 86 + 31 + 9c
180 = 117 + 9c
63 = 9c
7 = c

Answer:

  c = 7°

Step-by-step explanation:

You want the value of c given that angles in a triangle are marked 86°, 31°, and 9c.

The angle sum theorem tells you the sum of angles in a triangle is 180°. Using given angle values, this means ...

  86° +31° +9c = 180°

  117° +9c = 180° . . . . collect terms

  9c = 63° . . . . . . . subtract 117°

  c = 7° . . . . . . . . divide by 9

The value of c is 7°.

Answer:

29.5

Step-by-step explanation:

median number is the middle number

.25 = p ,

Solution :

equivalent to 10+ 4(-8q - 4)

Equivalent equations are systems of equations that have the same solutions. Identifying and solving equivalent equations is a valuable skill, not only in algebra class but also in everyday life. Take a look at examples of equivalent equations, how to solve them for one or more variables, and how you might use this skill outside a classroom.

Equivalent equations are systems of equations that have the same solutions. Identifying and solving equivalent equations is a valuable skill, not only in algebra class but also in everyday life. Take a look at

examples of equivalent equations

Equivalent equations are algebraic equations that have identical solutions or roots.

Adding or subtracting the same number or expression to both sides of an equation produces an equivalent equation.

Multiplying or dividing both sides of an equation by the same non-zero number produces an equivalent equation.

The first step is to know the rules of equivalent equations:

Adding or subtracting the same number or expression to both sides of an equation produces an equivalent equation.

Multiplying or dividing both sides of an equation by the same non-zero number produces an equivalent equation.

Raising both sides of the equation to the same odd power or taking the same odd root will produce an equivalent equation.

If both sides of an equation are non-negative, raising both sides of an equation to the same even power or taking the same even root will give an equivalent equation.

Solution :

10+ 4(-8q - 4)=0

10+ 4(-8q ) = 4

10-24 p =4

10 -4 =24 p

6 =24 p

6/24 = p

1/4 = p

.25 = p

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The values of x = 2 & y = 3.

A cyclist cycles for x hours at 12 km/hour and y hours at 18km/hour.

To find x and y:

Given kilometers = 78km

Time = 5 hours

So, we know that the

Distance Equation is 12x + 18y = 78 km

Time Equation is x + y = 5 hours

Multiply the equation through the Time Equation by 12:

12x + 18y = 78

12x + 12y = 60

Subtract and solve for "y":

6y = 18

y = 3

So now we have to Solve for "x" using x + y = 5

x + 3 = 5

x = 2

Hence the answer is the values of x = 2 & y = 3.

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The answer include the following:

Step 1: 7x + 21 = 9x - 4x + 37 - distributive property.

Step 2: 7x+ 21 - 21 = 9x - 4x +37 - 21 - subtraction property

Step 3: 7x = 5x +16 - combine like terms.

Step 4: 7x - 5x = 5x - 5x +16 - subtraction property.

Step 5: 2x = 16 - combine like terms

Step 6: 2x ÷ 2 = 16 ÷ 2 - division property.

Step 7: x = 54 - simplification.

This is referred to as process in which a mathematical expression is replaced by another so as to ensure that it is simpler and shorter in other solve the problem and for better understanding.

In the case of 7(x + 3) = 9x - 4x − 35, distributive property is used to expand the bracket and collecting of like terms are also used for easier subtraction and addition process

This employs the use of different arithmetic operations such as division, etc and the steps above shoes the most appropriate justifications in this type of scenario.

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simplification of expression will be g - 2

Our expression is  g - 16/4 + 2

16/4 = 4

so we c will write it as

g - 4 + 2

which can be further simplified to

g - 2

Therefore, our simplified expression comes out to be g - 2.

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Answer:

  A)  6.86×10⁴

Step-by-step explanation:

You want to write 68600 in scientific notation.

The number 68600 can be written in expanded form with exponents as ...

  68600 = 6×10⁴ +8×10³ +6×10² +0×10¹ +0×10⁰

The left-most term of this sum tells you the exponent in scientific notation:

  68600 = 6.86×10⁴

The result to the equation is x = 7.

To find the results of the equation √( 2x- 5) 4 = 1, we can break it step by step

Abate 4 from both sides of the equation

√( 2x- 5) = 1- 4

√( 2x- 5) = -3

Square both sides of the equation to exclude the square root

√( 2x- 5))² = (- 3)²

2x- 5 = 9

Add 5 to both sides of the equation

2x = 9 + 5

2x = 14

Divide both sides of the equation by 2

x = 14/2

x = 7

Thus, the result to the equation is x = 7.

Checking the extraneous result

Substituting x = 7 back into the original equation

√(2(7)-5)+4=1

√(14-5)+4=1

√9+4=1

3+4=1

7 = 1

This equation isn't true, which means that x = 7 is an extraneous result.

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