. The ratio of boys to girls in Ms. Cunningham's class is 2 to 3. There are 21 girls in the class. What is the total number of students in Ms. Cunningham's class?

Answer:

Let , the constant factor be x so 3 X + 5 x + 7 x = 180

Step-by-step explanation:

Find out the value of x

7x+3x+5x=180

15x=180

x=180/15

x=12

now,

     x=3 multiplied by 12=36

     x=7 multiplied by 12=84

      x=5 multiplied by 12=60

brainliest pls if u wannna

If Sheila mows 5 lawns in an hour. Then the 23 lawns can be mowed by the Sheila in 4 hours 36 minutes.

Division means the separation of something into different parts, sharing of something among different people, places, etc.

Sheila mows lawns for some people in her neighborhood in the summer to make extra money. She mows 5 lawns in an hour.

She has 23 lawns to mow.

Then the time taken to mow 23 lawns will be

\(\rm \rightarrow \dfrac{23}{5}\\\\\rightarrow 4.6 \ hours\)

4.6 hours can be written as 4 hours and 36 minutes.

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Answer:

£ 2.67

Step-by-step explanation:

1 liter = 1000 ml

Cost of 1000 ml shampoo =  £8.20

Cost of 1 ml shampoo = \(\frac{8.20}{1000}\)

Cost of 325 ml shampoo = \(\frac{8.20}{1000} * 325\)

                                         = 2.665

                                        = £ 2.67

0.003 is the probability that the number of calls among the 25 that involve a fax transmission exceeds the expected number by more than 2 standard deviations

To calculate the probability that the number of calls among the 25 that involve a fax transmission exceeds the expected number by more than 2 standard deviations.The mean is the expected number of calls involving a fax transmission, while the standard deviation is the measure of variability in the distribution. We then use this information to calculate the probability of exceeding the expected number by more than 2 standard deviations, which can be done using the z-score formula. The z-score for values more than 2 standard deviations away from the mean is 2.33, which corresponds to a probability of 0.003. Thus, the probability that the number of calls among the 25 that involve a fax transmission exceeds the expected number by more than 2 standard deviations is 0.003.

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Answer:

C

Step-by-step explanation:

when graphing this you use a circle instead of a dot when it is just less than 10 and not equal to 10

And if it is less than 10 than the arrow should be moving left

Hopes this helps please mark brainliest

Answer:

You'll need to find the area first.

18ft x 25ft= 450ft

Area is 450ft.

Area divided by $6.00 = 75

The total cost is $75 dollar for the whole room flooring.

Answer:

99 sure that the answer is -18

Answer:

x ,x+2, x+4, x+6 it mst b it

A rigid transformation is a rigid motion of a geometric object on a plane

The correct response is; Yes, the transformation is a rigid motion

Reason:

A rigid transformation or rigid motion is a motion in which the distance between pairs of corresponding points on the image and the preimage are equal

Therefore, given that the side lengths of the square, are each of length 3, such that the size of the preimage and the image are equal, and therefore, the distances between corresponding pairs of points on the image and the preimage, are equal, the transformation is a rigid motion

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Answer:

The answer is YES, it is a rigid motion.

Reason:

Because a rigid motion is one that does not change the shape or size, when you rotate a shape, you are only changing its orientation. The distance between any two points is also the same.

Answer:

5/1

Step-by-step explanation:

Answer:

140 db

Step-by-step explanation:

I have succesfully finished tihs

The value is closest to the sound level of the vocalizations of a blue whale is 140dB.

We have given that,

Intensity(I)= 106.8 watts/meter^2

The intensity of sound hair by the human ear is,

\(I_0=1\times10^{-12}\)

Sound intensity is defined as the power carried by sound waves per unit area in a direction perpendicular to that area.

We have to find which value is closest to the sound level, in decibels, of the vocalizations of a blue whale

So we have given the formula

\(B=10 log(\frac{I}{I_0} )\)

So use the given value we get

\(B=10 log(\frac{106.8}{1\times 10^{-12}} )\)

B= 140.28 dB≈140 dB

Therefore the value is closest to the sound level of the vocalizations of a blue whale is 140dB.

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Congruent triangles are also frequently employed in architectural designs, carpet patterns, stepping stone patterns, and geometric art.

The following are the two most typical instances of this: Equilateral triangles are used to make truss bridges, which are built on both sides.

Congruence :

If all three corresponding sides and all three corresponding angles are equal in size, two triangles are said to be congruent. Slide, twist, flip, and turn these triangles to create an identical appearance. They are in alignment with one another when moved. A term used to describe an object and its mirror counterpart is congruence. If two things or shapes superimpose on one another, they are said to be congruent. They are identical in terms of size and shape. Line segments having the same length and angles with the same measure are congruent in the context of geometric figures.

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Answer:

Step-by-step explanation:

Factors are 2 numbers that multiply to get the number.

EX.

2 and 4 are factors of 8

or

5 and 6 are factors of 30

So if you are given a polynomial, and they want you to factor it.  They want you to find other polynomials or numbers that multiply to your original polynomial.  Typically in the form of ( ) ( )

EX.  

x² + 6x + 8       this is a polynomial

(x+4)(x+2)        (x+4) and (x+2) are factors of that polynomial

The dimensions of the rectangular pool are (2x − 1) and (3x − 3). The length of the pool is 3x − 3 and the width of the pool is 2x − 1.

The area of Rectangle is length times of width.

Area of rectangular pool = 6x² − 11x + 3

To factor the trinomial, we need to find two binomials that multiply together to give the trinomial 6x² − 11x + 3.

We use product-sum method of factoring to find the two binomials.

We need to find two numbers that multiply to 6 (the coefficient of the x² term) and add to -11 (the coefficient of the x term).

6x² − 11x + 3

6x² −2x-9x + 3

(2x − 1)(3x − 3)

Hence, the dimensions of the rectangular pool are (2x − 1) and (3x − 3). The length of the pool is 3x − 3 and the width of the pool is 2x − 1.

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Answer:

aheje

Step-by-step explanation:

(5,3)

(2)

and

(-4,0)

(4-)

Answer:

Step-by-step explanation:

Hope it helps!!!

The statement "if s is a linearly dependent set, then each vector is a linear combination of the other vectors in s" is false.

A vector set's linear independence is an important attribute. If no vector in a set can be written as a linear combination of the other vectors in the set, the set is said to be linearly independent. The set is said to be linearly dependent if any of the vectors can be represented as a linear combination of the others.

If S is a linearly dependent set, then each vector in S is a linear combination of the others.

This is false.

For example, v₁ = (1,0), v₂ = (2,0), and v₃ = (1,1). Then v₂ = 2v₁ but v₃ is not a linear combination of v₁ and v₂, since it is not a multiple of v₁. But 2v₁ - 1v₂ + 0 v₃ = 0.

If an indexed set of vector S is linear dependent, then it is only necessary that one of the vectors is in the set.

Hence, the correct answer would be option (B).

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Answer:x= -1367284

over     170975

Step-by-step explanation:

-173.38=1368.35- 1.066

subtract the numbers

17.975x=1367.284

divide both sides

alternate form

x=7 170459

170975 x=7.999698

Answer

hi

Step-by-step explanation:

Answer:

Step-by-step explanation:

52 is 100%

you divide 52 by 10 to get 10%

5.2*6(because 60%)

=31.2

C. Because 3 x 4 is 12 obv. and 3 inches is 1/4 of 12 inches.

Answer:

y = -1/2

Step-by-step explanation:

5^3 = (5^-2)^y-1

3 = -2(y-1)

3 = -2y + 2

1 = -2y

y = -1/2

Alejandro can make 48 one-ounce bags of trail mix .

Since Alejandro has a 3-pound bag of trail mix, we need to convert the weight to ounces to determine how many one-ounce bags he can make.

1 pound is equal to 16 ounces. Therefore, a 3-pound bag is equal to 3 x 16 = 48 ounces.

To find out how many one-ounce bags Alejandro can make, we divide the total weight of 48 ounces by the weight of each one-ounce bag:

48 ounces / 1 ounce = 48 bags

So, Alejandro can make 48 one-ounce bags of trail mix .

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Answer:

4/5 - 3/10 is 0.5.

Step-by-step explanation:

You want to divide top and bottom (Whatever you do to one side do to the other) So start off dividing 5 by 10 which wil give you 0.5, next you want to divide 4 by 3 which gives a repeating decimal so youll use the whole decimal (0.5) as an answer

Answer: 1/2

Explanation: To subtract unlike fractions such as 4/5 - 3/10, first find a common denominator.

The common denominator of 5 and 10 is the

least common multiple of 5 and 10 which is 10.

To get a 10 in the denominator of 4/5, we multiply both the numerator and the denominator of 4/5 by 2 to get the equivalent fraction 8/10.

Notice that 3/10 already has a 10 in the

denominator so it stays the same.

So we have 8/10 - 3/10 which is 5/10.

5/10 can be simplified to 1/2.

The reliability coefficient determined by the correlation between scores on half of the items on a measure with scores on the other half of the measure is called split-half reliability.

This method is commonly used to estimate the internal consistency of a measurement instrument. The measure is divided into two halves, and the scores on one half are compared to the scores on the other half using correlation analysis.

A high correlation indicates that the two halves of the measure are consistent and reliable in measuring the same construct. However, split-half reliability assumes that the two halves of the measure are equivalent and that the items are interchangeable, which may not always be the case. Other methods, such as Cronbach's alpha, may be used to assess reliability more accurately.

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first you get the whole equation on one side

x^2 +x-2=0

after that you plug in x values to get y values.

plug 0 for x we get -2 for y. so our first point (0,-2)

plug 1 for x we get 0 for y so second point (1,-2)

you can continue graphing more points

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

Usually, when we talk about graphing an equation, we want to graph something of the form ...

  y = f(x)

Here, you have an equation with no dependent variable, so the graph of it is a graph of the two points that satisfy the equation. The graph would be a number line with points at -2 and 1.

__

If you want to graph something of the form ...

  y = f(x)

you can define two functions: one for the left side of the equation, and one for the right side:

  f(x) = -x +2

  g(x) = x^2

These are graphed in the conventional way: find points on the curve and plot a curve through them. Graphs of these functions are shown as solid lines in the second attachment. The solutions to the equation are the x-values of the points where the graphs intersect each other.

__

For many purposes, it is convenient to rewrite the equation to one that is of the form ...

  f(x) = 0

Here, we can do that by subtracting the left-side expression to get the standard-form quadratic ...

  x^2 +x -2 = 0

In this form, the graph of f(x) = x^2 +x -2 is shown as the dashed green line in the attachment. The solutions are the values of x that make f(x) = 0. These are also called the x-intercepts—points where the graph intercepts the x-axis.

Factoring the above equation gives ...

  (x +2)(x -1) = 0

The values of x that make these factors be zero are the solutions to the equation: x = -2, x = 1.

Answer:

-29/11

Step-by-step explanation:

i used a calculator lol

The series of transformation that move the pentagons is (d) translation, translation

From the question, we have the following parameters that can be used in our computation:

The figure

Where, we have:

This means that the only transformation is translation

So, the series of transformation is (d) translation, translation

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