Which graphs represent functions?
Graph A
Graph B
Graph C

Answer: The equation X + y = -5 represents a straight line in a two-dimensional plane. To determine whether a specific point (X, y) is a solution of the equation, you can substitute the values of X and y into the equation and see if it holds true. If the equation is satisfied, then the point (X, y) is a solution. If the equation is not satisfied, then the point (X, y) is not a solution.

For example, if X = 2 and y = -7, then the equation becomes:

2 + (-7) = -5

-5 = -5

Since the equation holds true, the point (2, -7) is a solution of the equation X + y = -5.

Step-by-step explanation:

Using the information given in the problem to set up two equations and by solving them

25% of the number is 80.

An equation is a mathematical statement that expresses the equality of two expressions. It typically consists of two parts: the left-hand side and the right-hand side, separated by an equal sign (=). The left-hand side and right-hand side can contain variables, numbers, and mathematical operations such as addition, subtraction, multiplication, and division.

Let's call the number we're looking for "x". We can use the information given in the problem to set up two equations:

0.7x = 224 (equation 1)

0.95x = 304 (equation 2)

We want to find 25% of the same number, which can be written as 0.25x. We can solve for x using either equation 1 or equation 2 and then plug that value into 0.25x to find the answer.

Let's solve for x using equation 2:

0.95x = 304

x = 304/0.95

x = 320

Now that we know x is 320, we can find 25% of that number:

0.25x = 0.25(320) = 80

So 25% of the number we were looking for is 80.

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The differential equations given correspond to phase lines with slopes that depend on the power of the x term in the equation.

1. y' = x: This differential equation corresponds to a phase line with a slope of 1, since the y' term is equal to the x term.

2. y' = -x: This differential equation corresponds to a phase line with a slope of -1, since the y' term is equal to the negative of the x term.

3. y' = [tex]x^2[/tex]: This differential equation corresponds to a phase line with a slope of 2x, since the y' term is equal to the x squared term.

4. y' = [tex]-x^2[/tex]: This differential equation corresponds to a phase line with a slope of -2x, since the y' term is equal to the negative of the x squared term.

5. y' =[tex]x^3[/tex]: This differential equation corresponds to a phase line with a slope of [tex]3x^2[/tex], since the y' term is equal to the x cubed term.

6. y' = [tex]-x^3[/tex]: This differential equation corresponds to a phase line with a slope of [tex]-3x^2[/tex], since the y' term is equal to the negative of the x cubed term.

7. y' = [tex]x^n[/tex]: This differential equation corresponds to a phase line with a slope of [tex]nx^(n-1)[/tex], since the y' term is equal to the x to the power of n term.

8. y' = -[tex]x^n[/tex]: This differential equation corresponds to a phase line with a slope of [tex]-nx^(n-1),[/tex] since the y' term is equal to the negative of the x to the power of n term.

In summary, the differential equations given correspond to phase lines with slopes that depend on the power of the x term in the equation.

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Complete question:

Determine which differential equation corresponds to each phase line. You should be able to state briefly how you know your choices are correct. ?

1.  y' = x

2. y' = -x

3.  y' = [tex]x^2[/tex]

4. y' = [tex]-x^2[/tex]

5.y' =[tex]x^3[/tex]

6.y' = [tex]-x^3[/tex]

7. y' = [tex]x^n[/tex]

8. y' = -[tex]x^n[/tex]

Black Beauty stands one inch taller than Thumbelina, measuring 18 inches in height compared to Thumbelina's 17-inch stature.

Black Beauty is 1 inch taller than Thumbelina.

Two or more expressions with an Equal sign is called as Equation.

Given that Thumbelina, who stands 17 inches tall

Black Beauty, who stands 18 inches tall.

Einstein, who stands 14 inches tall.

We have to find how tall is Black Beauty than Thumbelina.

To find out, we can subtract Thumbelina's height from Black Beauty's height:

Black Beauty's height - Thumbelina's height

= 18 inches - 17 inches = 1 inch

Therefore, Black Beauty is 1 inch taller than Thumbelina.

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Answer:

Yes

Step-by-step explanation:

length 138,435 ÷ 3 ft stride = 46,145 equally

The more accurate statement is that hypotheses are only as good as the observations on which they are based.

A hypothesis is a tested assertion regarding the relationship between two or more variables or a suggested explanation for some observable occurrence in a scientific setting.

As a result, hypothesis are only as good as the observations upon which they are built.

For instance, if we stay up late, we will be fatigued the next day. Turning off your phone allows it to charge more quickly. All of them are hypotheses since they are based on observations and are only valid for as long as the observations stay true.

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Players A and B withdraw balls from the urn consecutively until a read ball is selected, the probability that player A selects the red ball is approximately 0.408.

To find the probability that player A selects the red ball, we can use the law of total probability and consider all the possible ways the game could end. A selects the red ball on the first draw. The probability of this is simply the proportion of red balls in the urn, which is 3/10.

A selects a black ball on the first draw, followed by B selecting a black ball on their turn, and so on, until A finally selects the red ball. The probability of this is:

(7/10) * (6/9) * (5/8) * ... * (1/4) * (3/7)

Notice that the probability of selecting a black ball decreases by one after each turn, since the total number of balls in the urn decreases by one and the number of black balls decreases by one.

The probability of selecting the red ball on the last turn (after all the black balls have been selected) is 3/3 = 1. We multiply all these probabilities together to get the total probability of this sequence of events.

A selects a black ball on the first draw, followed by B selecting a black ball on their turn, and so on, until B finally selects the red ball. The probability of this is:

(7/10) * (6/9) * (5/8) * ... * (2/4) * (3/6)

Notice that the probability of selecting a black ball decreases by one after each turn, just like in the previous case. However, the probability of B selecting the red ball on their turn is now 3/6, since there are only six balls left in the urn at this point. We multiply all these probabilities together to get the total probability of this sequence of events.

Adding up these three probabilities, we get:

3/10 + (7/10) * (6/9) * (5/8) * ... * (1/4) * (3/7) + (7/10) * (6/9) * (5/8) * ... * (2/4) * (3/6) ≈ 0.408

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Answer:

all of these equations except 4n = 48

Step-by-step explanation:

your equations are

52 = 8n+4

4(2n+1) = 52

4 = 52-8n

4n = 48

n = 6

let's solve these equations!

52 = 8n + 4

48 = 8n

n = 6

4(2n+1) = 52

8n + 4 = 52

8n = 48

n = 6

4 = 52-8n

-48 = -8n

n=6

4n = 48

n = 12

all of these equations simplify to n = 6 except for 4n = 48, so they're all equivalent

a. The amount of copper in a bronze of 360g is 324g

b. The mass of bronze with 670.5g of copper is 745g

A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other. For example, if there is 1 boy and 3 girls you could write the ratio as: 1 : 3 (for every one boy there are 3 girls) 1 / 4 are boys and 3 / 4 are girls.

The ratio of copper to Tin is 9:1. The total ratio is 10

a.therefore the amount of copper = 9/10 × 360

= 324g

b. The mass of copper = 670.5g

therefore the mass of the bronze =

= 9/10× y = 670.5

9y = 670.5 × 10

9y = 6705

y = 6705/9

y = 745g

therefore the total mass of the bronze is 745g

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The two unique values of sin theta in radians are

The sine function has a range of [-1, 1], so there are multiple angles that correspond to a sine of 1/2.

The most commonly used values are π/6 (30 degrees) and 7π/6 (150 degrees), which are in the first quadrant and second quadrant and have a positive sine value of 1/2.

It's worth noting that there are an infinite number of angles that correspond to a given sine value, since the sine function has period 2π. These angles are related to the angles by adding or subtracting multiples of 2π.

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Answer:

< 1 is acute (less than 90⁰)

<2 is acute

<BOA is obtuse (greater than 90⁰)

Answer:

Step-by-step explanation:

Answer:

Check below

Step-by-step explanation:

Number of tiger shark teeth = 6

Number of sand shark teeth = 8

    Number of tiger shark teeth : Number of sand shark teeth

                                    6                :                8

∴ 6 : 8 ratio representation

Answer:

6:8

Step-by-step explanation:

The solution is 440 ft² because the overall size of the image is 528 sq ft, which in itself is closest approaching 440 square feet.

Parallel forms are defined as having at least two even more parallel lines. If two lines never cross, they are considered to be parallel. There are different parallel shapes, however any parallel sides require an equitable distribution of sides in the shape.

Sum of the measurements of the two main sides divided by height equals the area of a trapezoid.

Let's refer to the longer parallel side's length as "L." The figure's height is 22 feet, while the shorter parallel side's length is 16 feet.

Area = (L + 16) / 2 * 22

We also knows that the distance between a point and the vertical line formed by two studs is 4 feet and the distance between a vertex and the opposing height is 8 feet. The Pythagorean theorem may be used to determine the length of the greater parallel side, L, since these two lengths create a right triangle.

L² = (8 + 4)² = 64

L = 8

We can now calculate the overall area using the formula for a trapezoid's area.

Area = (L + 16) / 2 * 22 = (8 + 16) / 2 * 22 = 24 * 22 = 528

The solution is 440 ft² because the overall size of the figures is 528 sq ft, that is closest towards 440 sq ft.

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Answer: Jamie burned 420 calories on Tuesday

Step-by-step explanation:

Cross method is best for this question

Let x = calories burnt on tuesday
480 is 100%
x is 7/8 (or 87.5%)

∴
(480*87.5%) ÷ 100%
= 420 ÷ 100%
= 420

Therefore, Jamie burned 420 calories on Tuesday

Kyle: Rotation about the origin, then reflection across the x axis

Tina: Reflection over the line y = x

In geometry, reflection refers to a transformation that involves flipping a shape or object over a line, often called the "line of reflection".

This transformation preserves the size and shape of the original object, but changes its orientation by reversing the positions of all its points across the line of reflection.

Considering the image, rotation about the origin, then reflection across the x axis when compare with Reflection over the line y = x. will yield similar result.

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The probability that there are 30 or fewer successes in 112 trials with a probability of 0.42 of success is  0.874763 rounding to 6 decimaiplaces.

To use the Excel spreadsheet programme to calculate the likelihood that 30 or fewer successes occur in 112 trials with a success probability of 0.42, follow these steps:

In Excel, create a new spreadsheet with the first column labelled "Number of Successes" and the second column labelled "Probability."

Enter "0" in the first row of the "Number of Successes" column.

Enter "1" in the second row of the "Number of Successes" column.

Continue to input numbers in the "Number of Successes" column in ascending order until you reach 30.

Enter the following formula in the field next to the "0" in the "Probability" column: =BINOM.DIST (0,112,0.42,TRUE)

Enter the following formula: =SUM (B1:B31)

The result in the cell where you input the formula in step 8 will be the chance of 30 or fewer successes in 112 trials with a success rate of 0.42.

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Matrix A is: A = [1 2 3] and Matrix B is: B = [1]

                         [2 4 6]                                 [2]

                         [1 1 1]                                    [3]

An example of a 3x3 matrix A and a 3x1 matrix B such that the solution set of Ax = b is a line in R³ that does not contain the origin:

A = [1 2 3]

   [2 4 6]

   [1 1 1]

B = [1]

   [2]

   [3]

To check that the solution set of Ax = b is a line in R³, we can solve for x in terms of a parameter t:

Ax = b

[1 2 3] [x1] = [1]

[2 4 6] [x2]   [2]

[1 1 1] [x3]   [3]

Ax = b

x1 + 2x2 + 3x3 = 1

2x1 + 4x2 + 6x3 = 2

x1 + x2 + x3 = 3

Dividing the second equation by 2 and subtracting it from the first equation, we get:

-x1 - x2 = -1

Solving for x2 in terms of x1 and x3, we get:

x2 = -x1 + 1 - (3/2)x3

Solving for x3 in terms of a parameter t, we get:

x3 = t

Then, x1 can be expressed in terms of t as:

x1 = -t + 1

Therefore, the solution set of Ax = b is:

x = [-t + 1]

   [-t + 1 - (3/2)t]

   [t]

which is a line passing through the point (1, 1/2, 0) with a direction vector [-1, -3/2, 1].

A × [0; 0; 0] = [0; 0; 0]

Therefore, the origin is not on the line of solutions.

So, Matrix A is:

A = [1 2 3]

     [2 4 6]

      [1 1 1]

and Matrix B is:

B = [1]

     [2]

     [3]

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Let's call the time it takes to install all the chairs from start to finish "t". The workers install 840 chairs per day, so in "t" days they will have installed 840 * t chairs.

At the end of 5 days, they still have 240 chairs to install, so they have installed 840 * 5 chairs so far. We can use this information to write an equation:

840 * t - 840 * 5 = 240

Expanding and simplifying the equation gives us:

840t - 4200 = 240

Adding 4200 to both sides gives us:

840t = 4440

Finally, dividing both sides by 840 gives us:

t = 5.2857142857...

So it takes approximately 5.29 days to install all the chairs from start to finish.

Answer:

1/4 as fraction

0.25 as decimal

= 0.25

Step-by-step explanation:

Factors of 24 starting at 1 are:
1 x 24 = 24

2 x 12 = 24

3 x  8  = 24

4 x 6 =  24

Then the pattern repeats in decreasing orders of products of numbers . 6 x 4, 8,x 3 etc which are duplicates of the ones shown above

Factors of 24 are:

1, 2, 3, 4, 6, 8, 12, 24

There are 8 factors

Out of the 8 factors, only two  - 12 and 24 are two digit numbers

P(factor is a 2 digit number = # two-digit numbers/Total # factors

= 2/8

= 1/4

= 0.25

Answer:

1/4 as a fraction

0.25 as decimal

0.25

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The multiplication of the given fraction 6 × 3/5 is 15 or 3 3/5

Fraction refers to numbers which comprises of a numerator and a denominator. A numerator is the upper or top value of a fraction while a denominator is the lower or bottom value of a fraction.

6 × 3/5

multiply the numerator and denominator separately

= (6 × 3) / (1 × 5)

= 18/5

= 3 3/5

Therefore, 3 3/5 is the solution to the multiplication of the fraction.

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The probability that the committee has exactly two woman is 0.1758.

Probability determines the likelihood of an event occurring: P(A) = f / N. Odds and probability are related but odds depend on the probability. You first need probability before determining the odds of an event occurring.The ratio of the favorable outcomes to the all possible outcomes.

Given that, 4 women and 5 men are eligible to serve on a committee.

A committee of 3 is randomly selected.

Choosing 2 women out of 3 women is

³[tex]C_{2}[/tex]

= 3

Choosing 1 men out of  5 men is

5C1

= 5

Total number of eligible person is = (4+5)=9

Choosing 3 member out of 9 member is

9C3

=84

The required  probability is

=3*5/84

0.1785

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Answer:

Step-by-step explanation:

if the sum of two consecutive even numbers is 42 find the number

42 - 2 = 40                       remove the difference (2)

40 : 2 = 20                       find the smallest number

20 + 2 = 22                      find the largest number

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

(20 + 22 = 42)                

Answer: 3x + 8y

Step-by-step explanation:

Combining like terms is simply adding all the terms which are similar.

2x+6x-5x= 3x

5y+3y= 8y

Hope it helps!

In a magnetometry experiment, It will take 1 more minute for data be collected in order to reduce error the statistical noise by a factor of 10.

To reduce the random error by a factor of 10, we need to reduce the statistical noise to 1/10 picotesla. Since the statistical noise was initially 1 picotesla, this means we need to reduce it by a factor of 10.

We can use the following formula to calculate the time needed to reduce the statistical noise by a certain factor:

t = (log (final noise / initial noise)) / (log (reduction factor))

Here, the final noise is 1/10 picotesla, the initial noise is 1 picotesla, and the reduction factor is 10.

Plugging in these values, we get:

t = (log (1/10 / 1)) / (log (10))

t = (log (1/10)) / (log (10))

t = -1 / 1

t = -1

The negative value of t doesn't make sense in this context, so we need to take the absolute value:

t = |-1|

t = 1

Therefore, it will take 1 more minute to reduce the statistical noise by a factor of 10.

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____The given question is incomplete, the complete question is given below:

Reduction of the standard error

In a magnetometry experiment, after a minute of collecting

data the statistical noise was reduced to 1 picotesla.

For how much longer should data be collected in order

to reduce the random error by a factor of 10?

The number of possible requests for free samples is 5^1 = 5. This means that the customer has 5 different requests that they can make for free samples.

The number of possible requests for free samples can be calculated using the combination formula. The combination formula is used to calculate the number of combinations with repetitions of size “n” taken from a set of “r” elements . The formula is: [tex]C(n,r) = n^r[/tex] In this case, n = number of requests (1 request) and r = number of free samples offered (let’s say, 5). Therefore, the number of possible requests for free samples is[tex]5^1 = 5.[/tex]This means that the customer has 5 different requests that they can make for free samples.

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