The distributions shown, state the mean and standard deviation for each. Hint: The vertical lines are I standard deviation apart. Part: 0/2 Part 1 of 2 (a) 164.3 173.5 182.7 191.9 2011 210.3 219.5 Mean = Standard deviation

Answers

Answer 1

The mean is 120 and the standard deviation is 20.

How to find the mean and standard deviation?

We must calculate the mean and standard deviation from the curve in the preceding graph.

As we can see from the normal distribution curve that the center is at 120.

As a result, 120 is the distribution's mean.

From the above curve:

Mean + Standard deviation = 140

We know that the Mean = 120.

120 + Standard Deviation = 140

Standard Deviation = 20

Therefore, 20 is the standard deviation.

Therefore, from the given data we can find that the Mean is 120 and the Standard deviation is 20.

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Related Questions

a crane is oriented so that the end of the 25-m boom ao lies in the yz plane. at the instant shown, the tension in cable ab is 4.8 kn. determine the moment about each of the coordinate axes of the force exerted on a by cable ab.

Answers

Applying Pythagoras theorem, and drawing free body diagram we can measure the moments required.

First of all draw the free body diagram.

Now, in triangle AOC, apply Pythagoras theorem,

Now, write the coordinates of the points,

O (0, 0, 0) m

A (0, 15, 20) m

C (0, 0, 20) m

B (2.5, 0, 20) m

Now, write the position vector from A to B,

Now, write the unit vector rAB

Now, write the tensional force on the point A due to the cable AB,

Now, calculate the force ‘T’ about the origin,

Hence the moments about the coordinate axes are,

Mx = 78.9 kN.m

Mx = 13.15 kN.m

Mx = -9.86 kN.m

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A scientist records the temperature of three different mixtures as -33.625℉, -33 5/6℉, and -33 6/25℉. What is the order from least to greatest temperature of the mixtures?

Answers

Answer: To determine the order of the temperature of the mixtures from least to greatest, we need to compare the values of the temperatures in their simplified fractional forms.

-33.625℉ = -33 5/8℉

-33 5/6℉ = -33 5/6℉

-33 6/25℉ = -33 24/100℉

We can compare the fractions by comparing the numerators, if they are the same we can compare the denominators.

So, the order from least to greatest temperature of the mixtures is:

-33 6/25℉ < -33 5/6℉ < -33 5/8℉

It's important to notice that these temperatures are negative.

Step-by-step explanation:

Which statements are always true regarding the diagram? Select three options. m∠5 + m∠3 = m∠4 m∠3 + m∠4 + m∠5 = 180° m∠5 + m∠6 =180° m∠2 + m∠3 = m∠6 m∠2 + m∠3 + m∠5 = 180°

Answers

The correct statement for the given diagram are-

m∠5+m∠6=180°m∠2+m∠3=m∠6m∠2+m∠3+m∠5=180°Define the term supplementary angles?

Two angles are said to be supplementary if their sums total 180 degrees.

case A: m∠5+m∠3=m∠4  ...eq A

From the definition of supplementary angles

m∠3+m∠4=180°

m∠4=180°-m∠3   ....eq B

Put eq B in eq A

m∠5+m∠3=180°-m∠3

m∠5+m∠3+m∠3=180°

The result is true for m∠2=m∠3

Thus,

The case is not always true.

case B: m∠3+m∠4+m∠5=180°  ...eq A

From the definition of supplementary angles

m∠3+m∠4=180°

m∠4=180°-m∠3    ....eq B

Put eq B in eq A

m∠3+(180°-m∠3)+m∠5=180°

m∠5=0°

The case is not  true.

case C: m∠5+m∠6=180°

From the definition of supplementary angles

m∠5 and +m∠6 = 180

The case is always true.

case D: m∠2+m∠3=m∠6  ...eq A

From the definition of supplementary angles

m∠5+m∠6 = 180°

m∠6=180°-m∠5    ....eq B

Put eq B in eq A

m∠2+m∠3=180°-m∠5

m∠2+m∠3+m∠5=180°

Sum of interior angles of triangle equals 180 degrees

Thus,

This option will always be true.

case E:

m∠2+m∠3+m∠5=180°

Sum of interior angles of triangle equals 180 degrees

Thus,

This option will always be true.

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The correct question is attached.

Two restaurants offer customers large pizzas using different measurements for diameter. Restaurant 1: One large 14-inch pizza for $12.99 Restaurant 2: One large 36.83-centimeter pizza for $12.99 If 1 inch = 2.54 centimeters, what is the length of the crust around the larger pizza, using π = 3.14?
A. 115.65 inches
B. 22.77 inches
C. 43.96 inches
D. 45.53 inches

Answers

Answer:

D. 45.53 inches

Step-by-step explanation:

Restaurant 1: diameter = 14 inches

Restaurant 2: diameter = 36.83 inches × (1 inch)/(2.54 cm) = 14.5 inches

The larger pizza is from Restaurant 2, and its diameter is 14.5 inches.

circumference = πd = 3.14 × 14.5 inches = 45.53 inches

Answer: D. 45.53 inches

Answer:it is d 45.53

Step-by-step explanation:becuase I did the test

The bottom of a deep trench in an ocean is estimated to be 12,731 feet below sea level.
The corresponding integer is?


please help

Answers

Answer:

  -12,731

Step-by-step explanation:

You want to know what integer would be used to represent the value 12,731 feet below sea level.

Signed values

Usually we measure elevation up from sea level. So, distances below sea level are usually represented with negative numbers. The integer corresponding to 12,731 feet below sea level would be ...

  -12,731 . . . . feet

Projects that adopt agile methodology are not prone to the typical rapid changes that occur throughout the system development lifecycle.
False
True

Answers

Projects that adopt agile methodology are not prone to the typical rapid changes that occur throughout the system development lifecycle, The statement is False.

The methodology is defined as to the overarching strategy and rationale of your research project.

It involves studying the methods used in your field and the theories or principles behind them, in order to develop an approach that matches your objectives.

Agile project management methodology is commonly used for software development projects. It has greater adaptability to frequently changing scopes. Adopt Agile because they want to increase speed to market, meet customer demand, or increase team productivity.

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The value of x that makes the equation true is ____

Answers

The value of x that makes the equation true is 12°. The solution has been obtained using angle sum property of triangle.

What is Angle Sum Property?

The Angle Sum Property states that the sum of the measures of the angles of a triangle is 180°. This means that if you add up all three angles of a triangle, the total measure will be 180°. This property is true for all triangles, regardless of the size or shape. It is one of the most important properties in geometry and is used to solve problems involving angles in triangles.

We are given two angles as (2x)° and (5x+18)°

Also, we are given two sides of the triangle are same.

This means that the angles opposite to the sides are also same.

Thus, the angles of the triangle are (2x)°, (5x+18)° and (5x+18)°

Using angle sum property,

⇒ (2x)° + (5x+18)° + (5x+18)° = 180°

⇒ (2x)° + 2 * (5x+18)° = 180°

⇒ (2x)° + (10x+36)° = 180°

⇒ (12x + 36)° = 180°

⇒ (12x)° = 144°

⇒ x = 12°

Hence, the value of x that makes the equation true is 12°.

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compute the products in exercises 1\[dash]4 using (a) the definition, as in example 1, and (b) the row\[dash]vector rule for computing a x. if a product is undefined, explain why.

Answers

1) product is not defined.
2) product is undefined.
3)  [  -9 ]
    [  5  ]      
    [ -11 ]

Explanation:

1) product is not defined.
because no of column of 1st matrix (2)  is not same as no of row of second matrix.(3)

2) product is undefined.
because no of column of 1st matrix (1)  not same as no of row of second matrix (2).


3)  [    6     5 ]                           [    6  -15    ]                    [  9     ]
    [   -4    -3 ]  X  [ 1  ] =            [     -4   +9  ] =                [   5    ]
    [    7     6 ]       [ -3 ]              [      7  -18   ]                  [   -11   ]   
           

A matrix
is a rectangular array of numbers (or other mathematical objects) that defines operations like addition and multiplication. A matrix over a field F is typically a rectangular array of scalars, each of which is a member of F.

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En la frutería “Todo barato”, 2 kg de tomates cuesta $ 38.00. ¿Cuánto debe de pagar Karla si compra 9 kg de tomates

Answers

Answer: hi

Step-by-step explanation: hi

define the least common multiple of a and b to be the smallest positive number which is divisible by both a and b. prove that the least common multiple of a and b is ab precisely when a and b are coprime 6

Answers

The least common multiple(LCM) of two coprime numbers is their product, ab.

Let a and b be two positive integers, and let LCM(a,b) be the least common multiple of a and b.

By definition, LCM(a,b) is the smallest positive number which is divisible by both a and b.

Now, suppose that a and b are coprime, meaning that there are no positive integers other than 1 that divide both a and b.

Since 1 divides both a and b, and 1 is the smallest positive integer, we know that 1 is the only positive integer that divides both a and b.

Therefore, LCM(a,b) must be divisible by both a and b, and 1 is the only positive integer that divides both a and b.

Thus, LCM(a,b) = ab.

This proves that the least common multiple of a and b is ab precisely when a and b are coprime.

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2023 1-100 math challenge answers

Answers

Answer:

Step-by-step explanation: 1*23= 23 because anything times one is equal to itself

let f(x)=3x-1.then find g(x):if f(g(x))=9x the power of 2+12x+8​

Answers

Answer:

3x^2 + 4x + 3

Step-by-step explanation:

we can use this information to find g(x) in terms of f(x).

substitute f(x) = 3x-1 into f(g(x)) = 9x^2 + 12x + 8, we get:

3g(x) - 1 = 9x^2 + 12x + 8

Now, we can solve for g(x) by isolating it on one side of the equation:

3g(x) = 9x^2 + 12x + 9

g(x) = 3x^2 + 4x + 3

therefore g(x) is equal to 3x^2 + 4x + 3

Consider the weighted voting system [13: 14, 6, 4, 2]
Are dummies

Answers

The number of sequential coalitions is 13!

How to determine the number of sequential coalitions?

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

System = [13: 14, 6, 4, 2]

This means that

n = 13

The number of sequential coalitiions is calculated as

Coalition = n!

substitute the known values in the above equation, so, we have the following representation

Coalition = 13!

Hence, the coalition is 13!

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Complete question

Consider the weighted voting system [13: 14, 6, 4, 2]

How many sequential coalitions are there?

#17 please help!! I dont know what to do

Answers

The distance across the pond is 52 feet.

What is Congruence of Triangles?

Two or more triangles are said to be congruent if and only if sides and angles of one triangle is equal to the corresponding sides and angles of another triangle.

In the given diagram, there are two triangles.

If we prove the two triangles are congruent, we will get the distance across the pond as 52 feet.

Already 2 sides of one triangle is given as equal to 2 sides of the other triangle, which are 41 ft and 29 ft.

Also since the lines are intersecting the included angles of the equal sides of both triangle are equal by vertical angle theorem.

So two sides and an included angle of a triangle is equal to corresponding two sides and an included angle of other triangle.

So the triangles are congruent by SAS theorem.

So all the sides of two triangles are equal.

Distance across the pond is 52 feet.

Hence we get the distance across the pond is 52 feet.

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s for each matrix below, apply the given row operation(s) to the matrix in order, and give the resulting matrix.

Answers

The resulting matrix by applying the given row operations −2R2+3R1 →R1 is given by [tex]\left[\begin{array}{ccc}-25&5&-6\\8&5&6\end{array}\right][/tex] .

Matrix A is equal to :

A = [tex]\left[\begin{array}{ccc}-3&5&2\\8&5&6\end{array}\right][/tex]

Now replace the row R1 by applying the row operations -2R2 + 3R1 on the given matrix we get ,

First element of row 1 is replaced by :

-2(8) + 3(-3)

= -16 -9

= -25

Second element of row 1 is replaced by :

-2(5) + 3(5)

= -10 + 15

= 5

Third element of row1 is replaced by :

-2(6) + 3(2)

= -12 + 6

= 6

Therefore, the resulting matrix after applying the row operation is given by : [tex]\left[\begin{array}{ccc}-25&5&-6\\8&5&6\end{array}\right][/tex] .

The above question is incomplete , the complete question is :

Consider matrix A.

What matrix results  apply the given row operation(s) R1 to the matrix in order, and give the resulting matrix represented by −2R2+3R1?

A = [tex]\left[\begin{array}{ccc}-3&5&2\\8&5&6\end{array}\right][/tex]

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Drag numbers to complete a function in terms of x and y for the line that contains the points (2, 4) and (6, 16). Numbers may be used once, more than once, or not at all. 12346 y = x –

Answers

The function in terms of x and y for the line that contains the points (2, 4) and (6, 16) would be; y=3x-2

What is the slope?

The slope is the ratio of the vertical changes to the horizontal changes between two points of the line.

The slope of the line is calculated as follows:

m = Δy/Δx

Given that the line that passes through the points  (2, 4) and (6, 16)

To find the function of the line that passes through points  (2, 4) and (6, 16)

Therefore, the slope of the line is;

m = Δy/Δx

m = 3

The equation is;

y = mx + c

y = 3x - 2

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Draw the graph of y=f(x) and y= 1/f(x) on the same axes.
f) f(x) = -(x+4)²+1

are there any specific steps to get the answers here?

Answers

Answer: To graph y = f(x) and y = 1/f(x) on the same axes, you can follow these steps:

First, graph y = f(x) by plotting a few points, such as (-5, -19), (-3, -1), (0, 1) and (5, 19), and then connecting them with a smooth curve.

Then, graph y = 1/f(x) by finding the inverse function of f(x) which will be

1/f(x) = -1/(x+4)²+1

Next, plot a few points on this new function, such as (-5, -1/19), (-3, -1), (0, 1) and (5, 1/19), and then connecting them with a smooth curve.

Finally, make sure that the same x and y scales are used for both graphs, and label the axes and the functions clearly.

It is important to note that as f(x) = -(x+4)²+1, the domain of f(x) is all real numbers but the range is (1, infinity) so the reciprocal will be defined only for the range of f(x) and the domain of 1/f(x) will be (1, infinity)

Also, the graph of y = f(x) will be a parabola opening upwards and y = 1/f(x) will be a parabola opening downwards, both with vertex (-4,1)

The graph of y = -(x+4)²+1 will be a parabola opening upwards and the graph of y = -1/(x+4)²+1 will be a parabola opening downwards.

Step-by-step explanation:

Which one is correct?



A
B
C
D

Answers

Answer: C

Step-by-step explanation: TYSM if you give me a brainly... ps love you

Answer:

B.

A trapezoid looks like the following in the image, and B is the same but flipped.

Step-by-step explanation:

Hope it helps! =D

- Deondra has $32. She buys 4 movie
tickets for $6.25 each. How much money
does she have left to spend on popcorn?

Answers

Answer:

Okay so Deondra has a total of $32, and if she buys 4 tickets, and if each costs 6.25, then, you will multiply the amount in which each ticket costs by how many tickets total, and then subtract that quotient by the total amount of money Deondra has.

6.25 times 4 = 25

32 - 25 = 7

She has $7 left to spend on popcorn!

Step-by-step explanation:

Hope it helps! =D

Select the correct answer from each drop-down menu.
Robbie wants to construct an equilateral triangle. He draws diameter AB of circle O and constructs the perpendicular bisector of
diameter AB, find the points X and Y. Then he draws the triangle AXB. What error did he make?
The first mistake Robbie made was
Submit
.He should have
Reset

Answers

The first mistake Robbie made was, take improper lengths. AB is the diameter; its length is longer than the sides AX and XB. So, the triangle formed will not be an equilateral triangle.

What is an equilateral triangle?

An equilateral triangle in geometry is a triangle with equally long sides. The three angles opposing the three equal sides are equal in size because the three sides are equal.

The first mistake Robbie made was, take improper lengths. AB is the diameter; its length is longer than the sides AX and XB. So, the triangle formed will not be an equilateral triangle.

He should have, after drawing the diameter AB, construct a circle with point A as the center and AO as the radius. Mark the point of intersection as X. Then, AO, AX and OX would form an equilateral triangle.

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Answer:

1. constructing the perpendicular bisector of AB

2.

Step-by-step explanation:

Coding languages communicate information that is key to which of the following aspect(s) of the health care system?

Answers

code, in communications, a dull rule for replacing a piece of information such as a letter, word, or phrase with a casually selected equivalent.

The term has been frequently exploiting and used as a synonym for cipher, which is a method for transforming a message according to a rule to cover its meaning.

In the past this hazy of the distinction between code and cipher was rather inconsequential; in fact, many historical aught would be more properly classified as codes according to present-day criteria.

In modern communications systems, information is frequently both encoded and encrypted (or enciphered), and so an understanding of the variation between the two is important.

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NO LINKS!!

Write a function given the conditions noted below.

Answers

Answer:

[tex]\textsf{36)} \quad f(x)=\dfrac{7x}{x-12}[/tex]

[tex]\textsf{37)} \quad g(x)=\dfrac{1}{x+2}[/tex]

[tex]\textsf{38)} \quad h(x)=\dfrac{x-2}{(x-2)(x+3)}[/tex]

Step-by-step explanation:

Vertical AsymptotesEquation:  x = aA vertical asymptote occurs at the x-value(s) that make the denominator of a rational function zero.

Horizontal AsymptotesEquation:  y = bIf the degree of the numerator is less than the degree of the denominator, the horizontal asymptote is y = 0.If the degree of the numerator is greater than the degree of the denominator, there is no horizontal asymptote (but there is a slant asymptote).If the degree of the numerator is equal to the degree of the denominator, the asymptote is the result of dividing the highest degree term of the numerator by the highest degree term of the denominator.

Question 36

Given that the function has a horizontal asymptote at y = 7, the degree of the numerator must be equal to the degree of the denominator.

Also, 7 will be the result of dividing the highest degree term of the numerator by the highest degree term of the denominator.

Given that the function has a vertical asymptote at x = 12, the denominator must equal zero when x = 12.

Therefore, a rational function that meets these conditions is:

[tex]f(x)=\dfrac{7x}{x-12}[/tex]

Question 37

Given limits:

[tex]\displaystyle \lim_{x \to\infty} k(x)=0[/tex]

[tex]\displaystyle \lim_{x \to-2^+} k(x)=\infty[/tex]

The first limit means that as x approaches positive infinity, the function equals zero. Therefore, the rational function has a horizontal asymptote at y = 0. So the degree of the numerator should be less than the degree of the denominator.

The second limit means that as x approaches -2 from the positive side, the function equals positive infinity.  Therefore, the rational function has a vertical asymptote at x = -2.

Therefore, a rational function that meets these conditions is:

[tex]g(x)=\dfrac{1}{x+2}[/tex]

Question 38

A removable discontinuity (hole) exists on the graph of a rational function at any input value that causes both the numerator and denominator of the function to be equal.

Therefore, a rational function that meets these conditions is:

[tex]h(x)=\dfrac{x-2}{(x-2)(x+3)}[/tex]

For this rational function the hole is at (2, ¹/₅), as when x = 2, the numerator and denominator are both zero.

The functions can be represented as y = 7x/(x - 7), y = 1/(x + 2) and y = (x - 3)/[(x - 3)(x + 1)]

How to determine the functions

Conditions #1

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

Vertical asymptote, x = 12

Horizontal asymptote, y = 7

A function with the following features

Vertical asymptote, x = a

Horizontal asymptote, y = b

Can be represented as

y = bx/x - a

So, we have

y = 7x/(x - 12)

Conditions #2

Here, we have the following limits

lim x⇒∝ k(x) = 0 and lim x⇒2⁺ k(x) = ∝

This means that:

Vertical asymptote, x = -2

Using the rule in (1), we have

y = 1/(x + 2)

Condition #3

Here, we have

Function with a hole

This implies that the denominator and the numerator have a common factor

An instance of this is

y = (x - 3)/[(x - 3)(x + 1)]

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Give two reasons. why this shape is a square when x = 6

Answers

The two reasons why the shape is a square when x = 6 are:

i. It's length of sides are equal.

ii. The measure of it's internal angles are right angle.

Properties of a square.

A figure that is bounded by four straight sides on a 2 dimensional plane can be categorize as a quadrilateral. Examples are; rectangle, trapezium, rhombus, square etc.

A square is a shape which has an equal length of sides, and other distinguishing properties.

Considering the given question, when x = 6;

a. (3x - 7) = 3(6) - 7

              = 18 - 7

              = 11

b. (x + 5) = 6 + 5

              = 11

Therefore its sides are congruent.

Thus, the two reasons why the shape is a square are:

i. It has equal length of sides.

ii. It can be observed that each angle of the figure is a right angle.

So that the figure is a square.

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Use a graphing calculator to graph f(x)=-x^3+3x²-2 and find the following features of the graph. Round answers to the nearest hundredth, if necessary.

Answers

The x-intercepts of this graph from least to greatest are x = -0.73, x = 1, and x = 2.73.

The local minimum of this graph is (0, -2).

The local maximum of this graph is (2, 2).

The intervals on which the function is decreasing are x < -0.73 and x > 1.

The intervals on which the function is increasing are 1 < x < 2.73.

What is the local minimum of a graph?

The local minimum of a graph can be defined as the point on the graph of a function where it changes from a decreasing function to an increasing function, which is given by this ordered pair (0, -2).

Conversely, the local maximum of a graph can be defined as the point on the graph of a function where it changes from an increasing function to a decreasing function, which is given by this ordered pair (2, 2).

For any given function, y = f(x), if the output value is decreasing when the input value is increased, then, the function is referred to as a decreasing function.

In conclusion, we would use an online graphing calculator to plot the given function f(x) = x³ + 3x² - 2 in order to determine its key features.

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consider a circle of radius 2 centered at the origin. find parameterizations of this curve under the following assumption. clearly state any restriction on the variable of parametrization

Answers

As per the given radius, the parameterizations of this curve is 4

The term curve in math is defined as an abstract term used to describe the path of a continuously moving point

Here we have given that consider a circle of radius 2 centered at the origin.

And we have to find the parameterizations of this curve under the following assumption.

Here we have know that we need to find a parameterization for the circle of radius 2 in the xy-plane that one is centered at the origin at the direction of clockwise.

=> x(t) =  2cos(t) ------------------(1)

and

=> y(t) = −2sin⁡(t) -----------------(2)

Here we have to note that the given expression is written as,

=> x²(t) + y²(t)

When we apply the values on it then we get

=4cos²t⁡ + 4sin²t

Then it can be written as,

⁡=> 4(cos²t ⁡+ sin²t⁡)

=> 4

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Here is a number line from 0 to 1
0--------0.2A
a) Write a fraction with a denominator of 10 that could go after B on the number line. b) Write a fraction with a denominator of 100 that could go before A on the number line. c) Write three fractions that could be in between A and B on the number line. 0 Compare answers with a partner.​

Answers

Answer:

0.1 ,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9, 1

(a) show that f is one-to-one. (b) use theorem 7 to find s (f ^-1) d9sad. (c) calculate f 21 sxd and state the domain and range of f 21 . (d) calculate s f 21 d9sad from the formula in part (c) and check that it agrees with the result of part (b). (e) sketch the graphs of f and f 21 on the same axes.

Answers

The function f(x) = 9 - x² is a one to one function and the value of f⁻¹(x) = √9 - x.

The graph of the function is attached below.

In math the term graph is defined as a pictorial representation or a diagram that represents data or values in an organized manner.

Here we have the function f(x) = 9 - x² and here we also know that on the interval 0≤x≤3 and a=8.

Now, we have to check the given function is one to one or not, for that we have to plot the function on the graph then we get the graph like the following.

While we looking into the graph we have identified that each input value has exactly only one output, therefore it is said to be one to one function.

And the inverse of the function is calculated by rewritten the function as,

=>  f⁻¹(x) = √9 - x.

And the graph of f⁻¹(x) is plotted as follows,

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If I go to the store to buy 6 packages of sausages ( each package has 2 1/2 sausages ) and my dog eats 2 sausages every day in total
How many days until I need to go to the store for sausages again?

Answers

The number of days until I need to go to the store for sausages again is

7.5 days.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Number of packages = 6

Number of sausages in each package = 2(1/2)

Total sausages.

= 6 x 2(1/2)

= 6 x 5/2

= 3 x 5

= 15

Number of sausages the dog eats each day = 2

The number of days the sausages will be used.

= 15/2

= 7.5

Thus,

The number of days is 7.5 days.

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All the questions answered

Answers

The values of (a + b)(a - b) is a²-b² = (a-b) (a+b) and (x+7)² is x² + 14x+49 =  (x+7)(x+7)

What is Quadratic equation?

Any equation using the formula ax² + bx + c = 0 is a quadratic equation.

where a, b and c are constants, and x is an unknown variable.

It is called "quadratic" because the variable is squared (in other words, raised to the power of 2).

The most common way to solve a quadratic equation is to factor it into two linear equations, which can then be solved using the methods of linear algebra.

Another way is to use the quadratic formula, which expresses the roots of the equation in terms of the coefficients a, b and c.

It is called a quadratic equation because it can be written in the form

ax² + bx + c = 0

which is the standard form for a quadratic equation.

Examples:

1) x² + 4x – 5 = 0

2) 4x² – 7x + 3 = 0

3) 2x² + 3x – 4 = 0

Therefore , The values of (a + b)(a - b) is a²-b² = (a-b) (a+b) and (x+7)² is x² + 14x+49 =  (x+7)(x+7)

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Please help, I cannot figure out how to do this for the life of me -number 15

Answers


2.62007585
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1.3365088
,
4.2835670
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