Please solve for y P=2x+2y+4

Answer:

I wrote out the answers on top of the sheet. Hope this helped!

Step-by-step explanation:

The given probability distribution is a discrete probability distribution.

Given,

 x:    3        4        7

P(X=x): 0.19    0.3    0.51

Discrete probability distribution property;

∑P\((x_{i} )\) = 1

Discrete probability distribution;

The outcomes of events that can be counted or are finite are included in a discrete probability distribution. This differs from a continuous distribution, in which results can occur anywhere along a continuum. The binomial, Poisson, and Bernoulli distributions are typical examples of discrete distributions.

That is,

∑P\((x_{i} )\)

= 0.19 + 0.3 + 0.51

= 1

The property for a discrete probability distribution is thus satisfied.

So, the probability distribution that is being presented is a discrete probability distribution.

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The given question is incomplete. Completed question is given below;

Determine whether or not the distribution is a discrete probability distribution and select the reason why or why not. x −3 4 7 P(X=x) 0.19 0.3 0.51 Answer First, decide whether the distribution is a discrete probability distribution, then select the reason for making this decision.

the question is that a team of 8 people will take 6 days to paint a 4,800 square feet home.

We can use the formula T = k * A / N, where T is the time taken to paint the home, A is the area of the home, N is the number of people hired, and k is the constant of proportionality. We can find k by using the given information that a team of 6 painters do up a 2,400 square feet home in 8 days.

k = T * N / A = 8 * 6 / 2400 = 0.02

Now, we can use the formula to find the time taken by a team of 8 people to paint a 4,800 square feet home.

T = k * A / N = 0.02 * 4800 / 8 = 12 days

Therefore, the answer is that a team of 8 people will take 6 days to paint a 4,800 square feet home.

The time taken to paint a home varies directly with the area of the home and inversely with the number of people hired for the job. By using the formula T = k * A / N, we can find the time taken by a team of painters for different scenarios.

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-2.62 lies in the critical region (-∞, -2.019) ∪ (2.019, ∞), So we reject the null hypothesis (H0) and conclude that there is sufficient evidence to suggest that the average yield strengths of the two materials are different.

Random sample consisting of n₁ = 20 specimens of cold-rolled to determine yield strengths resulted in a sample average strength of X, = 29.8 ksi.

Second random sample of n₂ = 25 two-sided galvanized steel specimens gave a sample average strength of

X₂ = 34.7 ksi.

Assuming that the two yield- strength distributions are normal with σ₁ = 4.0 and σ₂ = 5.0.

To test the hypothesis, Null hypothesis (H0) : u₁ = u₂

Alternative hypothesis (Ha) : u₁ ≠ u₂

Where, α = 0.01

Degrees of freedom = n₁ + n₂ - 2

= 20 + 25 - 2

= 43

Level of significance (α) = 0.01

Critical value of t at α/2 and df = 43 is ± 2.680.

Now, calculate the test statistic: This is the formula to calculate the test statistic, Where, S₁ and S₂ are the sample standard deviations of the two groups.

From the data, sample size is n₁ = 20 and n₂ = 25,

so degrees of freedom = 20 + 25 - 2 = 43.

So, t value will be as follows:t = (X₁ − X₂) / √ [(S1^2 / n₁) + (S2^2 / n2)]

Here, σ₁ = 4.0,

σ₂ = 5.0,

X₁ = 29.8 ksi,

X₂ = 34.7 ksi,

n₁ = 20 and n₂ = 25.

Now, substitute the values:t = (29.8 - 34.7) / √ [(4^2/20) + (5^2/25)]t = -4.9 / 1.87t

= -2.62Now compare the calculated t value with the critical value of t at α/2 and df = 43 is ± 2.680.

Since -2.62 lies in the critical region (-∞, -2.680) ∪ (2.680, ∞),

So we reject the null hypothesis (H0) and conclude that there is sufficient evidence to suggest that the average yield strengths of the two materials are different.

At α = 0.05:Level of significance (α) = 0.05

Degrees of freedom = n1 + n2 - 2 = 20 + 25 - 2 = 43

Level of significance (α) = 0.05Critical value of t at α/2 and df = 43 is ± 2.019.

Now, calculate the test statistic:t = (X₁ − X₂) / √ [(S1^2 / n1) + (S2^2 / n2)]t = (29.8 - 34.7) / √ [(4^2/20) + (5^2/25)]t

= -4.9 / 1.87t = -2.62

Now compare the calculated t value with the critical value of t at α/2 and df = 43 is ± 2.019.

Since -2.62 lies in the critical region (-∞, -2.019) ∪ (2.019, ∞), So we reject the null hypothesis (H0) and conclude that there is sufficient evidence to suggest that the average yield strengths of the two materials are different.

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The experimental probability of rolling a 1 or a 2 is 0.2.

Hence, Option A is correct.

We know that,

The experimental probability of an event is defined as the number of times the event occurred divided by the total number of trials.

In this case,

The event is rolling a 1 or a 3,

Which occurred ⇒  3 + 1

                           = 4 times.

Given that there are total number of trials = 20.

Therefore,

The experimental probability of rolling a 1 or a 3 = 4/20,

                                                                                = 1/5

                                                                                 = 0.2

Hence, the required probability is 0.2.

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The complete question is:

Sarah is playing a game in which she rolls a number cube 20 times. The results are recorded in the chart below. What is the experimental probability of rolling a 1 or a 3?

Number on cube:1,2,3,4,5,6

Number of times event occurs:3,6,1,5,3,2

A.0.2

B.0.3

C.0.6

D.0.83

Each person in the United States uses an average of 18 metric tons of mineral resources each year.

Step by step explanation:According to the USGS, each person in the United States uses an average of 18 metric tons of mineral resources each year. It has been stated that many of the minerals we use in our daily lives are found in things we use every day, such as electronic devices, personal care products, and vehicles.

Mineral resources are utilized in many aspects of our lives, including construction, transportation, energy production, and electronics. As a result, minerals are an essential component of the modern economy.

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Answer: The area is approximately 314 ft^2

Step-by-step explanation:

Well if the diameter is 20  feet then the radius will be 10 because the radius is half the diameter, and to find the area of a circle, you use the formula

A= \(\pi r^{2}\)  where A is the area and pi times the radius squared.

We will represent pi by 3.14  

A= 3.14* 10^2

A= 3.14 * 100

A = 314

Answer:

y=-3

Step-by-step explanation:

slope is 0 so we know it is a straight line.

your y value is -3 so therefor is your answer

The dependent variable in a study, also known as the response variable, is affected by the independent variables.

What is a variable?
A variable is a sign and placeholder for any mathematical object (from the Latin variabilis, "changeable") in mathematics. A variable can, for example, represent a number, a vector, a matrix, a function, the argument of a function, a set, or a set's component.

Numerous issues are resolved in a single computation by using variables in algebraic calculations as if they were explicit integers. For instance, by exchanging the variables that represent them in the quadratic formula with the numerical values of the coefficients in any given quadratic equation, the quadratic formula may solve any quadratic equation. A variable in mathematical logic is either a symbol for an undefined term in the theory or an undefined phrase itself (a meta-variable).

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Answer:

8

Step-by-step explanation:

2(2)^2-3(2)(-3)-2(-3)^2

2*4+18-18

8+18-18

8+0

8

Answer:

7 Kids like cats

Step-by-step explanation:

Answer: find lcm of 35 and 45, which is 315. Convert 315 seconds to minutes, and you will get 5.25 min.

A team of 3 boys and 3 girls be selected from 5 boys and 4 girls in 40 ways

The selections are given as:

3 boys from 5 boys

3 girls from 4 girls

Each selection is calculated using:

\(^nC_r = \frac{n!}{(n- r)!r!}\)

So, we have:

\(Ways = ^5C_3 * ^4C_3\)

Apply the combination formula

\(Ways = \frac{5!}{2!3!} * \frac{4!}{1!3!}\)

Expand

\(Ways = \frac{5 * 4 * 3!}{2 * 3!} * \frac{4 * 3!}{1 * 3!}\)

Simplify

Ways = 5 * 2 * 4

Evaluate

Ways =40

Hence, the number of ways is 40

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The assumption for linear regression analysis that is violated when the dependent variable is binary is the linearity of observed and predicted values. Binary variables only take on two values (0 or 1), and thus cannot be plotted on a linear regression line. Therefore, linear regression analysis is not appropriate for binary variables. Logistic regression is a more appropriate analysis method for binary variables.

Hi! If the dependent variable is binary and linear regression analysis is used, then the assumption for linear regression analysis that is violated is the "normality of error." This is because binary variables, which take only two values (e.g., 0 and 1), do not follow a continuous normal distribution, and thus, the errors in prediction are not likely to be normally distributed. Linear regression is designed for continuous dependent variables, so it's not ideal for analyzing binary outcomes.

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Answer:

4 years

Step-by-step explanation:

Answer:

7 years without either of them, 13 years without your father.

Step-by-step explanation:

I'm so sorry for your loss

Applying this property to this case:

Answer:

Step-by-step explanation:

If coins 110 plus 130 will give you 240 coins

If actual money 110 times 5 will give you 550 plus 130 will give you 680 or 6 dollars and 80 cents.

N times 5 plus p will be your equation

The lists that shows grade levels in order from the greatest fraction of students to the least fraction of students is of:

7th grade, 8th grade, 5th grade, 6th grade, 9th grade.

Here, we have,

A fraction is a numerical representation of the division of the two values x and y, as follows:

Fraction = x/y.

The terms are called as follows:

x is the numerator of the fraction.

y is the denominator of the fraction.

The decimal equivalent, which is used to order the fractions, of a fraction is obtained by the division of the numerator of the fraction by the denominator of the fraction.

Hence the equivalents of each fraction are given as follows:

5th grade: 33/50 = 0.66.

6th grade: 13/20 = 0.65.

7th grade: 18/25 = 0.72.

8th grade: 51/75 = 0.68.

9th grade: 3/5 = 0.6.

Hence the order from greatest to least is of:

7th, 8th, 5th, 6th, 9th.

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complete question:

The table shows the fraction of students from different grade levels who are in favor of adding new items to the lunch menu at their school.

Which list shows the grade levels in order from the greatest fraction of students to the least fraction of students?

Responses

7th grade, 8th grade, 9th grade, 6th grade, 5th grade

7th grade, 8th grade, 9th grade, 6th grade, 5th grade

9th grade, 6th grade, 7th grade, 5th grade, 8th grade

9th grade, 6th grade, 7th grade, 5th grade, 8th grade

8th grade, 5th grade, 7th grade, 6th grade, 9th grade

8th grade, 5th grade, 7th grade, 6th grade, 9th grade

7th grade, 8th grade, 5th grade, 6th grade, 9th grade

Answer:

A

Step-by-step explanation:

Range = Highest value - Lowest value

At Park Zoo:

R = 44 - 38

= 6

At Countryside Zoo;

R = 45 - 38

= 7

So, it cannot be D, because the ranges are not the same and it cannot be B because the range is greater at countryside zoo

The mode is the value that appears the moat frequently.

At Park zoo, the mode is 41 since it has the most dots.

At Countryside zoo, the mode is 40, since it has the most dots

So, it cannot be C because Park zoo has a greater Mode.

so, the only answer is A

Therefore, the angle between A⃗ and B⃗ is approximately 79.71 degrees.

To find the angle between vectors A⃗ and B⃗, we can use the dot product formula:

A⃗ · B⃗ = |A⃗| |B⃗| cos(θ)

where A⃗ · B⃗ is the dot product of A⃗ and B⃗, |A⃗| and |B⃗| are the magnitudes of A⃗ and B⃗, and θ is the angle between them.

Given that A⃗ · B⃗ = 1.91 (from the vector product) and |A⃗| = 2.96 and |B⃗| = 3.10, we can rearrange the equation to solve for cos(θ):

cos(θ) = (A⃗ · B⃗) / (|A⃗| |B⃗|)

cos(θ) = 1.91 / (2.96 * 3.10)

Using a calculator to compute the right-hand side, we find:

cos(θ) ≈ 0.206

Now, to find the angle θ, we can take the inverse cosine (arccos) of 0.206:

θ ≈ arccos(0.206)

Using a calculator to compute the arccos, we find:

θ ≈ 79.71 degrees

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Answer:

Vertical shrink by 2

Step-by-step explanation:

Multiplying by 2 stretches the function. It does not shrink it.

Answer: Vertical shrink by 2

Answer: The value of x can be either 5 or 10.

Step-by-step explanation:

We are given:

Total profit, P = $5600

The given equation follows:

⇒ P = 600 + 1500x - 100x²

Putting value of P in above equation, we get:

⇒ -100x² + 1500x + 600 = 5600

⇒ -100x² + 1500x - 5000 = 0

⇒ 100x² - 1500x + 5000 = 0

Solving this equation by middle term split, we get:

⇒ 100(x² - 15x + 50) = 0

⇒ (x² - 10x - 5x + 50) = 0

⇒ x(x - 10) - 5(x -10) = 0

⇒ (x - 10)(x - 5) = 0

⇒ x = 10, 5

Hence, the value of x can be either 5 or 10.

Answer:

95,237,00

0989,000

955,700

132,200

Step-by-step explanation:

there are no really steps on this you just have to put the numbers in order from biggest to smallest

Answer:

it not clear maybe you can take an other pohto

sorry

Step-by-step explanation:

Answer:

false, true, fale

Step-by-step explanation: hi

Answer:

The sum of the angles in a triangle is 180°, so the angles do form a triangle. Since two of the three angles are congruent, the triangle is an isosceles triangle. An infinite number of isosceles triangles exist with different side lengths. Therefore, more than one triangle exists with the given angle measures.

Answer:

x = 28.1°

Step-by-step explanation:

Cos = adjacent side/hypotenuse

cos x = 15/17

x = arccos (15/17)

  = 28.1°

Note:  If you memorize all the definitions of the trig functions, then these kinds of problems are much easier.  OK?

Answer:

it is

Step-by-step explanation:

Answer:

Not Proportional, you're correct

The positive value of x is 6

An index, or power, is the small floating number that appears after a number or letter.

For example, x⁵ is an exponent expression. 5 is the index or power and x is the base. There are some rules that guides Indices.

25^(2x) = 5^(x²-12)

= 5^(4x) = 5^(x²-12

4x = x²-12

x²-4x -12 = 0

x² -6x +2x -12 = 0

(x²-6x) (2x-12) = 0

x( x-6) 2( x-6) = 0

(x+2)(x-6) = 0

x+2 = 0 or x-6 = 0

x = -2 or +6

therefore the positive value of x is 6

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First lets find out how much sugar was needed

1/4=1/4=2/4

2/4+1/6=6/12+2/12=8/12

8/12 simplified=2/3

2/3 of the sugar is needed

3/4-2/3=9/12-8/12=1/12

1/12 of the sugar was left