What are the zeros of f left parenthesis x right parenthesis equals x cubed minus 57 x plus 56 ​?

Answers

Answer 1
f(x)=x^3-57x+56
Regroup to factor it: f(x)=x^3-x-56x-56=(x^3-x)-(56x+56)
f(x)=x(x^2-1)-56(x+1)
f(x)=x(x+1)(x-1)-56(x+1)
f(x)=(x-1)[x(x+1)-56] =(x-1)(x^2+x-56)=(x-1)(x+8)(x-7)
the zeros are the values of x when f(x)=o
(x-1)(x+8)(x-7)=0
x=1, -8, 7

Related Questions

is 2x-5y=10 a function ------is it linear or nonlinear?

Answers

The answer is Linear I believe

It is linear when 2x- 5y = 10.  A linear equation is an equation of a straight line, which means that the degree of a linear equation must be 0 Or 1.

How can we tell whether a function is linear or not?

Looking at a function’s graph will reveal if it is linear or not with the greatest ease. When a linear function is plotted on a graph, a straight line is formed.

A nonlinear function Is curved in some way; it does not form a straight line.

How is a function defined as linear?

The graph of a linear function is a straight line. One independent variable and one dependent variable make up a linear function.

X and Y are the independent and dependent variables, respectively. The constant term, or a, is the y-intercept.

Is a function 2x-5y=10 real? Is it nonlinear or linear?

Given that a linear equation is an equation of a straight line, its degree must be either 0 or 1.

For every one of its elements. In this instance, both the degree of the variables Y and X is 1.

Resolve the Y equation.

2x-5y=10

Y=-2+2x/5

Hence Given that a linear equation is an equation of a straight line, its degree must be either 0 or 1. For every one of its elements. The degree of the variable Y in this instance is 1, while the degree of the variable X is linear at 1.

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How many ways can i distribute 3 slices of pizza to 3 people of fairness doesn't matter?

Answers

You could cut the slice up into 3 more pieces or however many slices of that slice of pizza and distribute it among 3 people unfairly.

What does .9999 rounded to the thousandths?

Answers

.9999 rounded to the nearest thousandths is 1

hope this helps
.9999 rounded to its thousandths is 1

The length of a rectangle is twice the width. the perimeter is 32 cm more than the width. find the dimensions of the rectangle.

Answers

Width: x
Length: 2x
Perimeter=2x+2x+x+x=6x
32 cm more than width means x+32
6x=x+32
5x=32
x=6.4
Dimension is 6.4×12.8 (width×length)

The dimensions of the rectangle are 6.4 and 12.8 respectively.

What is the perimeter of the rectangle?

The formula for calculating the perimeter of a rectangle is given by :

P = 2 ( L + w )

The length of a rectangle is twice the width. And the perimeter is 32 cm more than the width.

L = 2w

Now substituting into the formula , we have

Width: x

Length: 2x

Perimeter P = 2 ( L + w ) = 2(3x) = 6x

Since 32 cm more than width means x+32

6x = x + 32

5x = 32

x = 6.4

Hence, Dimension is 6.4 × 12.8.

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The length of a rectangle is 1 ft more than double the width, and the area of the rectangle is 45 ft2 . find the dimensions of the rectangle.

Answers

A = L * W
A = 45
L = 2W + 1

45 = W(2W + 1)
45 = 2W^2 + W
2W^2 + W - 45 = 0
(2W - 9)(W + 5) = 0

W + 5 = 0
W = -5...not this one because it is negative

2W - 9 = 0
2W = 9
W = 9/2
W = 4.5 <=== the width is 4.5 ft

L = 2W + 1
L = 2(4.5) + 1
L = 9 + 1
L = 10 <=== the length is 10 ft

The width of the rectangle is 4.269ft and the length is  8.538 ft.

What are the area and perimeter of a rectangle?

We know the perimeter of any 2D figure is the sum of the lengths of all the sides except the circle and the area of a rectangle is the product of its length and width.

Given, The length of a rectangle is 1 ft more than double the width.

Assuming the width to be x ft, therefore length would be (2x + 1) ft.

We know area of a rectangle(A) = length×width.

∴ x×(2x + 1) = 45.

2x² + 2x = 45.

2x² + 2x - 45 = 0.

[tex]x_{1,\:2}=\frac{-2\pm \sqrt{2^2-4\cdot \:2\left(-45\right)}}{2\cdot \:2}[/tex].

[tex]x_1=\frac{-2+2\sqrt{91}}{2\cdot \:2},\:x_2=\frac{-2-2\sqrt{91}}{2\cdot \:2}[/tex].

[tex]x=\frac{-1+\sqrt{91}}{2},\:x=-\frac{1+\sqrt{91}}{2}[/tex].

[tex]\left(\m\quad x=4.26969\dots ,\:x=-5.26969\dots \right)[/tex].

∴ x = 4.269ft is the admissible value as length can not be negative.

∴ length is 8.538 ft.

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Given that the rectangle above has a perimeter of 34 units, find . round the answer to the nearest hundredth.

Answers

what are you supposed to find? 

A science museum charges an admission fee of $10 per adult and $6 per child. If the museum had 2,000 visitors on a particular day and the total collection was $18,800, how many adults and children visited the museum?

Answers

a = adult
c = child

10a + 6c = 18,800
a + c = 2,000

In the second equation, subtract c from both sides.

a = 2000 - c

Put this into the first equation.

10(2000 - c) + 6c = 18800

Multiply everything in the parenthesis by 10.

20,000 - 10c + 6c = 18,800

Combine like terms.

20,000 - 4c = 18,800

Subtract 20,000 from both sides.

-4c = -1,200

Divide -4 on both sides.

c = 300

Put this into the second equation.

a + 300  = 2,000

Subtract 300 from both sides.

a = 1,700

Hope this helps!

Jason has 75 feet of wallpaper border. He wants to put up a wallpaper border around his rectangular bedroom that measures 12 feet by 14 feet. He multiplies 12 x 14 = 168 to get an exact answer of how much border he needs. He concludes that he does not have enough border for the whole job.

1. Tell how you can critique Jason’s reasoning.

2. Critique Jason’s reasoning

3. Jason uses an overestimate to decide how many rolls of wallpaper he needs for another’s room. Explain why his reasoning to use an overestimate does or does not make sense

Answers

Let's summarize the facts:

the tape is 75 feet long

the bedroom is 12 feet by 14 feet. 

1. Tell how you can critique Jason’s reasoning.

If you want to Critique Jason's reasoning, you could a) ask yourself the same questions that Jason did and see if you would come with the same answers and used the same analysis or b) analyse Jason's answer to see if he did a mistake or missed an important detail and made a thought mistake


2. Critique Jason’s reasoning

 I will use the option b from above:  

Jason first multiplied 12 x 14 = 168. This multiplication is correct, but what did he get? He needed to get the perimeter of the bedroom  because it was only the wallpaper border, not the wallpaper itself - so getting the perimeter was needed, but this we get by the formula ( 2* *(length+width), not length* width - as Jason did.
So Jason made a mistake here! his actual answer should be 2*(12+14)=2*26=52, so the tape of 75 feet would have been enough!

3. Jason uses an overestimate to decide how many rolls of wallpaper he needs for another’s room. Explain why his reasoning to use an overestimate does or does not make sense

Using an overestimate is often a good idea- in case some of the tape gets damaged, he will have some left. However, since his calculations are wrong by a lot (he multiplies rather than adds and multiplies by 2), his overestimate will be a lot higher than would be practical - he would be left with a lot of leftovers and spend too much money. So his reasoning does not make sense

If each password must contain at least one upper-case letter, one lower case letter and one number, how many passwords are there? unanswered

Answers

There are 26 letters in the alphabet and 10 numbers (0-9)
So it will be 26x26x10=6,760

the probability distribution table shows the proportion of people living in the five different regions of a city there are now 4200 residents in the city.

How many live in the south region?

Photo attached

Answers

Since there are a total of 4,200 residents and the question is asking for the amount in the south region, take the distribution number from the chart, 0.16, and multiply it by 4,200.
4200 ×.16 = 672

672 residents

Answer: Number of residents live in south region= 672 residents.


Step-by-step explanation:

Given:- Total residents in the city =4200

let A be the event of residents live in south region the,

Probability of residents live in south region P(A) = 0.16

So, Number of residents live in south region=Product of probability of residents live in south region and total residents in the city =0.16×4200=672 residents.

What are the x and y-intercepts of the line described by the equation?

3x−9y=10.8



Enter your answers, in decimal form, in the boxes.

x-intercept =
y-intercept =

Answers

to find the x int, sub in 0 for y and solve for x
3x - 9y = 10.8
3x - 9(0) = 10.8
3x = 10.8
x = 10.8/3
x = 3.6 or (3.6,0) <== ur x int

to find the y int, sub in 0 for x and solve for y
3x - 9y = 10.8
3(0) - 9y = 10.8
-9y = 10.8
y = -10.8/9
y = - 1.2 or (0,-1.2) <== ur y int

The x-intercept and the y-intercept of the line described by the equation 3x - 9y = 10.8 are 3.6 and -1.2

The x-intercept of a line is the point where y-coordinate is zero while the y-intercept of the line is the point where the x-coordinate is zero

Given the expression 3x - 9y = 10.8

Get the x-intercept. If y = 0

3x - 9(0) = 10.8

3x = 10.8

x = 10.8/3

x = 3.6

Get the y-intercept. If x = 0

3(0) - 9y = 10.8

-9y = 10.8

y = -10.8/9

y = -1.2

Hence the x-intercept and the y-intercept of the line described by the equation 3x - 9y = 10.8 are 3.6 and -1.2

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∠E and ∠F are vertical angles with m∠E=5x+10 and m∠F=7x−12 . What is the value of x? Enter your answer in the box.

Answers

5x+10=7x-12.... 24=12x.......2=x


Vertical angles are congruent, so E=F

5x+10=7x-12
10=2x-12
22=2x
11=x

The coordinate of the midpoint of segment AB is (-3, 2). Find the coordinate of A if the coordinate of B is (0, 2).

A =

(-6,2)
(-3/2,2)
(3,2)

Answers

The answer is (-6,2). I hope this helped you!

How many 1-cm squares would it take to construct a square that is 3 m on each side?

Answers

1200 squares because, 3 m =  300 cm and a square has 4 sides so you times 3 and 4 and you get 12 so 12 m = 1200 cm

I can’t seem to figure out how I would graph this? Someone help please

Answers

Label the number line, put a filled in circle on 2 and make it go left. Then put a clear circular on 2 and make it go right.
check the picture below.

Which expression is equivalent to 3x(1.05)?

A: 3x + 3x + 3x
B: 1.05x + 1.05x + 1.05x
C: x + 3.15
D: 1.05x + 3

Answers

3x(1.05) 

answer
B: 1.05x + 1.05x + 1.05x

An employee works 21 days per month if they worked an average of 7.5 hours per day how many hours do they work per month

Answers

7.5 times 21 = 157.5 hours. 

You can verify that by dividing 157.5 by 21 to see how many hours she worked in a day. 

157.5 divided by 21 is 7.1 hours

My answer is correct!

Students in a science class are divided into 6 equal groups with at least 4 students in each group for a project. write and solve an inequality that represents the number of students in the class

Answers

There are a total of 6 groups.

And each group contains at least 4 students.

So the minimum number of students is:

minimum = 6 * 4 = 24 students

 

Let us say that x represents the number of students, hence:

x ≥ 24

Final answer:

To represent the number of students in the class, we can write the inequality 24 ≤ x.

Explanation:

To represent the number of students in the class, let's assume that the total number of students in the class is represented by the variable 'x'. Since the students are divided into 6 equal groups and each group has at least 4 students, we can write the inequality:
6 * 4 ≤ x

Simplifying the inequality:
24 ≤ x

This inequality represents that the total number of students in the class should be greater than or equal to 24.

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Translate and solve: the quotient of a number x and -8 is 25

Please help,
Thank you :)

Answers

Well if you were to put the problem into words, it'd be:
x/-8 = -25

Thus, to solve for x, multiply both sides by -8:
x/-8(-8) = -25(-8)
x = 200

Economists study the way society uses its resources. One important resource studied is agriculture. The recent increase in demand for organic produce has created some interesting economic scenarios for both farmers and consumers. Click the link to learn key facts about the economics of organic produce and answer a few questions. Which is a reason that organic farming is more expensive than conventional farming? How many years must a farm be run organically before its produce can be labeled as “organic”? Why do most small organic farms pay a higher percentage of their profit for farming equipment than conventional farms?

Answers

Answer:

Which is a reason that organic farming is more expensive than conventional farming?

Organic farmers must pay for a costly certification process

How many years must a farm be run organically before its produce can be labeled as “organic”?

3

What is a benefit of crop rotation?

Rotating crops can help build healthy soil.

Step-by-step explanation:

Just took the test!

Answer:

Economists study the way society uses its resources. One important resource studied is agriculture. The recent increase in demand for organic produce has created some interesting economic scenarios for both farmers and consumers. Click the article to learn key facts about the economics of organic produce and answer a few questions.

Which is a reason that organic farming is more expensive than conventional farming?

✔ Organic farmers must pay for a costly certification process.

How many years must a farm be run organically before its produce can be labeled as “organic”?

✔ 3

What is a benefit of crop rotation?

✔ Rotating crops can help build healthy soil.

Step-by-step explanation:

just got it on edge

Write each mixed number as an improper fraction. 1 7/8 1 7/12 2 1/2 NEED BRAINLIEST!!!

Answers

15/8 19/12 5/2 is the answer for this problem 

Find the axis of symmetry for this parabola : y= 2(x-7)(x+9)

Answers

y = 2(x-7)(x+9)
y = 2x - 14x (x +9)
y = 2x^2 +18x -14x^2 + 126x
y = -12x^2 +144x
axis of symmetry = -b / 2a
= -144 / 2*-12
= 6
axis of symmetry x = 6





The equation of line m is 4x+5y=−2. What is the slope of a line that is perpendicular to line m?

Answers

convert to slope / intercept form:-

4x + 5y = -2
5y = - 4x - 2
y = -4/5 x - 2/5

the slope of this line is -4/5  and slope of line perpendicular to it is - 1 / -4/5

= 5/4 answer

The required slope of a line will be 5/4 which is perpendicular to line m.

What are the perpendicular lines?

Perpendicular lines are two lines that cross one other and create a 90-degree angle. Two lines are perpendicular if the product of their slopes is -1.

The equation of line m is given in the question below as:

⇒ 4x + 5y = −2

We have to determine the slope of a line that is perpendicular to line m

First, we need to find the slope of line m

To convert to slope-intercept form

⇒ 4x + 5y = -2

⇒ 5y = - 4x - 2

⇒ y = -4/5 x - 2/5

So the slope of this line is -4/5  and the slope of a line perpendicular to it is

⇒ - 1 / (-4/5)

Reciprocal the terms in the numerator,

⇒ 5/4

Therefore, the required slope of a line will be 5/4 which is perpendicular to line m.

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Raise to the power:

(–0.2xy)4

Answers

since there are parenthesis, you have to distribute the exponent to the whole thing. That ends up as -0.2^4 x^4 y^4. -0.2^4 can be simplified, it’s -0.0016. End answer is
-0.0016 x^4 y^4. The ^ symbols just mean that it’s to the power of four. x^4 = x to the power of four.

Find the quotient. y 9 ÷ y 3 y3 y6 y9 y27

Answers

y^9 ÷ y^3 = y^(9-3) = y^6

answer
y^6

Answer:

The quotient is [tex]y^6[/tex]

Step-by-step explanation:

Given expression is,

[tex]y^9\div y^3[/tex]

[tex]=\frac{y^9}{y^3}[/tex]

By using quotient of powers property of exponent,

[tex]\frac{a^n}{a^m}=a^{n-m}[/tex]

[tex]=y^{9-3}[/tex]

[tex]=y^6[/tex]

Hence, the quotient is [tex]y^6[/tex]

Second option is correct.

Which phrase describes an unknown or changeable quantity?

Answers

The following choices given in the question that describes an unknown or changeable quantity

I would think the answer is "a variable".

Given that AE is a tangent of the circle with the center at B, BC = 3.5, and AE = 24, which is the length of EC?
7
13
25
49

Answers

We are actually given here a right triangle where EC is the hypotenuse. The length of one side is AE = 24, and the other side AC is simply twice BC, so AC = 7:

EC^2 = AE^2 + AC^2

EC^2 = 24^2 + 7^2

EC = 25

tom can wash 44 plates in 3 minutes. how many seconds will it take him to wash 12 wash? show your work.

Answers

49.090 seconds. Cross multiply 44/180 x 12/x.    X= 49.090

the sum of three integers is 92. the second number is three times the first number. the third number is ten less than twice the first number. find the integers

Answers

1st number = x

 2nd number = 3x

3rd number = 2x-10

x +3x + 2x-10 =92

6x - 10 = 92

6x =102

x = 102/6

x = 17

1st number = 17

2nd number = 17*3 = 51

 3rd number = 17 *2 = 34-10 = 24

17 + 51 + 24 = 92

 3 numbers are 17, 51 and 24

Does the graph represent the function?

Answers

A vertical line that is allowed to move from left to right across the graph can only touch the graph at one point at a time. The graph passes the vertical line test, so it is a function.
YES, since it passes the vertical test
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