What is the answer I need it quick 3/4 + 3/7 A 1 5/28. B 1 7/28 C 6/28 D 6/11

Answer:

x = -1 and y = -3

Step-by-step explanation:

The given equations are :

2x+3y= -11 ...(1)

8x -2y= -2​​ ...(2)

We need to solve the equations.

Multiply equation (1) by 4.

8x+12y= -44 ...(3)

Subtract equation (2) from (3).

8x+12y-(8x -2y) = -44-(-2)

8x+12y-8x +2y = -42

14y = -42

y = -3

Put the value of y in equation (2).

8x -2(-3)= -2​​

8x+6 = -2

8x = -8

x = -1

So, the values of x and y are -1 and -3 respectively.

Using the work done formula, we know that the work done by the young man is 0 Joule.

Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement.

For a constant force acting in the same direction as the motion, the work is simply equal to the product of the force's magnitude and the distance traveled.

Work is calculated using the formula Work = Force x Distance.

In order to determine the separation between force and labor, proceed as follows:

Find the work (W) that is done when the force (F) is applied.

Multiply the force that was used (F) by the amount of labor (W).

So, the work done formula is:

W = Fs

Where F is force, s is displacement and W is work done.

Now, insert the values and calculate as follows:

W = Fs

W = 9000*0

W = 0 J

Therefore, using the work done formula, we know that the work done by the young man is 0 Joule.

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The equivalent equation of 9x - 12 = 36 is 9x = 48.

Equivalent equations are algebraic equations that have identical solutions or roots.  Two equations are equivalent if you can manipulate one equation to get the other equation.

Therefore, let's find the equivalent equation of 9x - 12 = 36.

Hence, let's manipulate the equation 9x - 12 = 36 to get the equivalent equation.

9x - 12 = 36

add 12 to both sides of the equation

9x - 12 + 12 = 36 + 12

9x = 48

Therefore, the equivalent equation is 9x = 48.

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9514 1404 393

Answer:

  2310

Step-by-step explanation:

Assuming "this particular sale" totals 33000 in its entirety, the commission is ...

  20% × 33000 = 6600

The amount of that going to the savings account is ...

  35% × 6600 = 2310

The amount invested is 2310.

The correct options that could be an example of a function with a domain (-∞0,00) and a range (-∞,4) are given below.Option A. V = -(0.25)x - 4 Option B. V = − (0.25)x+4

A function can be defined as a special relation where each input has exactly one output. The set of values that a function takes as input is known as the domain of the function. The set of all output values that are obtained by evaluating a function is known as the range of the function.

From the given options, only option A and option B are the functions that satisfy the condition.Both of the options are linear equations and graph of linear equation is always a straight line. By solving both of the given options, we will get the range as (-∞, 4) and domain as (-∞, 0).Hence, the correct options that could be an example of a function with a domain (-∞0,00) and a range (-∞,4) are option A and option B.

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The probability of color coming up the same for rolling two 20-sided dice is 129/400.

Probability is defined as how likely something is to happen. For a single dice, getting a maroon, teal, and cyan have a probability of 4/20, 7/20, and 8/20, respectively.

Before solving the probability, we must identify whether the events are considered independent or dependent. Independent events are when the probability of an event happening does not affect the other's event probability of happening. A dependent event is when the probability of an event happening affects the other event. The rolling of dice is considered an independent event.  

For events that should occur together, the multiplication rule is used. To solve for the probability of two sides coming up the same, the formula below is used.

P (A and B) = P (A) * P (B)

P (red and red) = (4/20)*(4/20) = 1/25

P (teal and teal) = (7/20)*(7/20) = 49/400

P (cyan and cyan) = (8/20)*(8/20) = 4/25

Since no specific color was stated in the problem, the sum of the probability of each color coming up the same is determined.

P (color come up the same) = P (red and red) + P (teal and teal) + P (cyan and cyan)

P (color come up the same) = 1/25 + 49/400 + 4/25

P (color come up the same) = 129/400

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Answer:

Answer is 235/45

Step-by-step explanation:

The value of probability P(A∩B) is 1/5, P(A∩B') is 3/10, P(A) is 3/7 and P(B|A) is 4/5.

Let A be the event that ball chosen from urn II was black. And let B be the event that ball transferred from urn I to Urn II was white.

Therefore, A' will be the event that ball chosen from urn II was not black. And B' will be the event that ball transferred from urn I to Urn II was not white.

The probability of getting a black ball from Urn II:

P(A) = Probability of black ball in Urn II= 2/5

The ball transferred from Urn I to Urn II, then a ball is chosen at random from Urn II.

Therefore, the probability of getting a black ball from Urn II when transferred from Urn I:

P(A|B) = (Probability of getting transferred white ball from Urn I to Urn II and then getting a black ball from Urn II) / Probability of getting a white ball from Urn I and transferring it to Urn II. = (2/4 * 2/5) / (1/2 * 5/7)= 7/20

The probability of transferred ball was white:P(B) = Probability of transferred ball being white from Urn I= 1/2

Now, we can calculate the remaining probabilities:

P(A∩B) = Probability of transferred white ball from Urn I to Urn II and then getting a black ball from Urn II= 2/4 * 2/5= 1/5

P(A∩B') = Probability of transferred white ball from Urn I to Urn II and then not getting a black ball from Urn II= 2/4 * 3/5= 3/10

P(B') = Probability of transferred ball being not white from Urn I= 1 - 1/2= 1/2

P(A|B') = (Probability of getting transferred not white ball from Urn I to Urn II and then getting a black ball from Urn II) / Probability of getting a not white ball from Urn I and transferring it to Urn II. = (2/4 * 3/5) / (1/2 * 2/7)= 3/7

P(B|A) = (Probability of getting a black ball from Urn II when transferred from Urn I) / Probability of transferred white ball from Urn I to Urn II. = (2/5 * 2/4) / (1/2)= 4/5

Hence, the probability that the ball transferred from Urn I to Urn II was white is 4/5.

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Answer:

1.2p−3

Step-by-step explanation:

Answer:

-3+1.2p

Step-by-step explanation:

Distribute .6 across the parenthesis (.6*-5 and .6*2p)

Answer:

\(x^{\frac{3}{2} } p^{6}\)

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

C. y = -2x - 1

Step-by-step explanation:

y = mx + b

The slope is going down so that means that the m will be negative.

We are left with two choices:

y = -2x - 1

y = -2x + 1

Check the graph again to find what point does the line intersect the vertical line (y-axis). That hits in (0, -1) or -1.

So the only answer applicable is option C.

Answer:

150 cm

Step-by-step explanation:

1 metre = 100 cm

so 3 metres = 300cm

300 - 150 = 150

so we have 150cm left

Answer:

40 degreses

Step-by-step explanation:

there is a right angle and that means it is 90 degreese then it gives you 50 degreese so you add them up and get 140 then you subtract that 140 from 180 and get 40 degreese.

Answer:

c

Step-by-step explanation:

cause it is

Answer:

-2/3

Step-by-step explanation:

y2-y1 over x2-x1

The answer to the trigonometry question in the picture attached is:

   = cos θ / [sin θ * (1 - sin θ)] * (1 + sin θ)

Simplify 1-csc θ as follows:

1 - csc θ = (1 - csc θ)(1 + csc θ) / (1 + csc θ)

= 1 - csc^2 θ / (1 + csc θ)

= 1 - 1/sin^2 θ / (1 + 1/sin θ)

= 1 - sin^2 θ / (sin θ + 1)

= (sin θ - sin^2 θ) / (sin θ + 1)

Simplify 1+csc θ as follows:

1 + csc θ = (1 + csc θ)(1 - csc θ) / (1 - csc θ)

= 1 - csc^2 θ / (1 - csc θ)

= 1 - 1/sin^2 θ / (1 - 1/sin θ)

= 1 - sin^2 θ / (sin θ - 1)

= (sin θ + sin^2 θ) / (sin θ - 1)

Substitute the above simplifications in the expression cos θ/(1-csc θ) * 1+csc θ/(1+ csc θ) to get:

cos θ / (sin θ - sin^2 θ) * (sin θ + sin^2 θ) / (sin θ + 1)

Simplify the expression by canceling out the sin^2 θ terms:

cos θ / (sin θ - sin^2 θ) * (sin θ + sin^2 θ) / (sin θ + 1)

= cos θ / (sin θ - sin^2 θ) * (1 + sin θ) / (sin θ + 1)

Simplify further by factoring out common terms in the numerator and denominator:

cos θ / (sin θ - sin^2 θ) * (1 + sin θ) / (sin θ + 1)

= cos θ * (1 + sin θ) / [(sin θ - sin^2 θ) * (sin θ + 1)]

Finally, simplify the expression by factoring out a sin θ term from the denominator:

cos θ * (1 + sin θ) / [(sin θ - sin^2 θ) * (sin θ + 1)]

= cos θ * (1 + sin θ) / [sin θ * (1 - sin θ) * (sin θ + 1)]

= cos θ / [sin θ * (1 - sin θ)] * (1 + sin θ)

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Hey there! :)

Answer:

C. x = 6.

Step-by-step explanation:

Given:

4(8 - x) = 8

Solve for x. Distribute:

32 - 4x = 8

Subtract 32 from both sides:

-4x = -24

Divide both sides by -4:

-4x/(-4) = -24/(-4)

x = 6.

5.67x10^-3

can you also please mark me as brainliest?

Answer:

(0,1) (2,2) (4,3) (6,4) (8,5) (10,6)

Step-by-step explanation:

rise over run, graph it out

Answer:

A. To find a linear equation that models the temperature T when crickets are chirping at x chirps per minute, we need to use two points that are known. In this case, we are given that a cricket produces 120 chirps per minute at 70 degrees F and 168 chirps per minute at 80 degrees F. We can use these two points to find the slope and y-intercept of the line.

The slope of a line can be found using the formula: m = (y2 - y1) / (x2 - x1)

In this case, we can substitute the given values to get:

m = (168 - 120) / (80 - 70) = 48/10 = 4.8

The y-intercept of a line can be found using the formula: b = y - mx

We can use the point (70, 120) and the slope that we found to get:

b = 120 - (4.8 * 70) = -264

So the linear equation that models the temperature T when crickets are chirping at x chirps per minute is:

T = 4.8x - 264

B. If the crickets are chirping at 150 chirps per minute, we can substitute this value for x in the equation we found above to estimate the temperature:

T = 4.8x - 264

T = 4.8(150) - 264 = 720 - 264 = 456

So the estimated temperature is 456 degrees F.

C. The y-intercept of the line is -264, it represents the temperature when x (chirps per minutes) is zero. In this case it represents the temperature when the cricket is not chirping which is impossible, so it doesn't have any physical meaning.

Answer: $650 + $450 divide it and then subtract it then it should be the answer X

Step-by-step explanation: answer

The half-life of radon-222 is 3 days, it will take an additional 3 days for the remaining 42% of the sample to decay, for a total of 6 days for the sample to decay completely.

The half-life of a radioactive is time for 50% of its particles to decay or disintegrate into a new element. The pace at which a radioactive material will decay is predicted using this indicator of an isotope's stability. An element's half-life, which differs substantially across various elements, is based on the unique characteristics of its nucleus.

For instance, the half-life of uranium-238 is 4.5 billion years whereas that of carbon-14 is 5,730 years. This indicates that half of the carbon-14 atoms in a sample will have decayed after 5,730 years, and half of the uranium-238 atoms will have decayed after 4.5 billion years.

How to solve?

(a) After 3 days, the sample has decayed to 58% of its original amount, which means that half of the original amount has already decayed. Therefore, the half-life of radon-222 is 3 days.

(b) Since the half-life of radon-222 is 3 days, it will take an additional 3 days for the remaining 42% of the sample to decay, for a total of 6 days for the sample to decay completely.

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The covariance and the correlation coefficient between two variables should always have the same sign is False.

The covariance and the correlation coefficient between two variables can have different signs. The covariance is a measure of the direction and strength of the linear relationship between two variables. It can be positive, indicating a positive relationship where both variables move in the same direction, or negative, indicating an inverse relationship where the variables move in opposite directions.

On the other hand, the correlation coefficient is a standardized measure of the linear relationship between two variables, ranging from -1 to 1. It can also be positive or negative, depending on the direction of the relationship, but its magnitude is always between 0 and 1, indicating the strength of the relationship.

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The number of people in the office is 13. We want to select different groups of 5 people

Number of ways that the first phone can be answered = 13

Number of ways that the second phone can be answered = 14

Since order is anot allowed, we would apply combination. Thus, the number of ways is

13C5 = 1287

The probability that exactly one fourth of the questions will be answered correctly is approximately 0.00166.

Given,

Number of multiple choice questions = 40

Each question has four possible answers, and only one of them is correct.

Thus, Probability of getting a question correct = 1/4.

Probability of getting a question incorrect = 1 - 1/4 = 3/4

Let X be the number of questions answered correctly by the student.

Since there are 40 questions in total,

X can take any value between 0 and 40, inclusive.

To find the probability that exactly one fourth of the questions will be answered correctly, we need to calculate the probability that X = 10.

Using the binomial distribution formula,

The probability of answering exactly k questions correctly out of n total questions is given by :

P(X = k) = nCk x pk x (1-p)n-k

where, nCk is the number of ways to choose k questions from n total questions,

p is the probability of answering a question correctly, and

1-p is the probability of answering a question incorrectly.

So, the probability of answering exactly 10 questions correctly is :

P(X = 10) = 40C10 x (1/4)10 x (3/4)30P(X = 10) ≈ 0.00166.

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The plain language for the probability of the event "A or B" is "A or B" is the event that the person chosen is overweight or obese.

Probability is a term to describe the chance of some event can occur. The probability is often written as percentages or proportions.

p(A) is the probability of event A can occur in this case this the probability of the chosen child is obese which is 0.41 according to the national center for health statistics.

p(B) is the probability of event B can occur in this case this the probability of the chosen child is overweight but not obese which is 0.33 according to the national center for health statistics.

The plain language for the event "A or B" is event A or event B can occur, so the "A or B" is the event that the person chosen is overweight or obese.

Your question is incomplete, but most probably your full question was

Although the rules of probability are just basic facts about percentages or proportions, we need to be able to use the language of events and their probabilities. Choose an American kid (between 8 and 12) at random. Define two events:

A = the person chosen is obese

B = the person chosen is overweight, but not obese

According to the national center for health statistical,

P(A) = 0.41and P(B) = 0.33.

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Answer:

23

Step-by-step explanation:

sin (55)/a =  sin(20)/10

Answer:

70. Each chore they do is plus 4. So you would subtract 4 from 74 and you would get 70.

A proportional relationship is given by the expression:

y=kx, where k is the constant of variation

Then, in this case, isolating the variable y

y=-8/4x

y=-2x

The constant of variation would be k=-2