Mathematics High School

What are the solutions of the equation X4-9x2 + 8 = 0? Use u substitution to solve.
O x = 1 and x = 2.13
O x=+1 and x=+22
O x= ti and X=
O x = ti and X=25
=+21/2

Answers

Answer 1

Answer: the answer is B

Step-by-step explanation:

What Are The Solutions Of The Equation X4-9x2 + 8 = 0? Use U Substitution To Solve.O X = 1 And X = 2.13O
Answer 2

The solutions of the equation X⁴-9x² + 8 = 0 is ±2√2 and ±1

How to solve equation using substitution

X⁴-9x² + 8 = 0

Let x² = y

Then the equation becomes y² - 9y + 8 = 0

This is in the form ax² + bx + c = 0

We can solve by using quadratic formula for finding roots

x = {-b ± √(b² - 4ac)} / 2a

where,

a = 1, b = -9, c = 8

= {-(-9) ± √((-9)2 - 4(1)(8))} / 2(1)

= {9 ± √(81 - 32)} / 2

= {9 ± √49} / 2

= {9 ± 7}/2

= 16/2, 2/2

= 8, 1

y = 8,1

x = ±2√2, ±1

Learn more about equation:

https://brainly.com/question/16863577

Related Questions

Find the equation of the line that
- is perpendicular to the line y=3x-1
and
-passes through the point (7,4)

Answers

Answer:

y = -1/3x + 19/3

Step-by-step explanation:

let the equation of the line be y = mx + b

since it is perpendicular to y = 3x - 1, these two lines's gradient when producted gives -1.

hence, 3 x m = -1

m = -1/3

sub m = -1/3 and (7, 4):

4 = -1/3(7) + b

b = 19/3

therefore, equation of the line is y = -1/3x + 19/3

Topic: coordinate geometry

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25 POINTS!! State the minimum monthly income and hourly wage per worker needed to cover monthly expenses for the family you used in part a. Then, explain how to calculate the hourly wage based on the monthly income and state the hourly wage. Assume that each full-time worker works four 40-hour work weeks per month, and each part-time worker works two 40-hour weeks per month.

Answers

Full-time worker minimum monthly income = US$ 7,846.40

Part-time worker minimum monthly income  = US$ 7,846.40

Full-time worker hourly wage = US$ 49.04

Part-time worker hourly wage = US$ 98.08

Step-by-step explanation:

1. Let's review the information given to answer the question correctly:

Monthly costs of a 2-adult and 3-children family in the Modesto metro area = US$ 7,846

Full-time worker = 4 weeks of 40-hour per month

Part-time worker = 2 weeks of 40-hour per month

2. Let's calculate the minimum monthly income and hourly wage per worker

Full-time worker hourly wage = Monthly costs/160

Part-time worker hourly wage = Monthly costs/80

Full-time worker hourly wage = 7,846/160

Part-time worker hourly wage = 7,846/80

Full-time worker hourly wage = US$ 49.04

Part-time worker hourly wage = US$ 98.08

Full-time worker minimum monthly income = Hourly wage * 160

Part-time worker minimum monthly income  = Hourly wage * 80

Full-time worker minimum monthly income = US$ 7,846.40

Part-time worker minimum monthly income  = US$ 7,846.40

I just need to know the answers for number 3. I don’t understand how to do it. Thank u sm!

Answers

Answer:

Step-by-step explanation:

The Observatory charges a $100 trip fee, plus $6.50 per student. Identify the rate of change.

Answers

Answer:

i deepends on how many students but if you have 5 kids then its 100$ plus 6.50 each kid

Step-by-step explanation:

Answer: Maybe I agree with the student, deepends on how many students but if you have 5 kids then its 100$ plus 6.50 each kid.

Step-by-step explanation:

The function P gives the numbers of people in millions who own a smart phone t years after year 2000. What does P(17)=2320 tell us about smartphone ownership?

Answers

Answer:

2320 smartphone owners exists in the year 2017

Step-by-step explanation:

Given that:

P is a function ; which gives the number of people who own a smartphone t years after year 2000

If P(17) = 2320

Then the function stated above represents the number of people who own a smartphone 17 years after year 2000

17 years after year 2000 equals ;

2000 + 17 = 2017

Hence, according to the function 2320 smartphone owners exists in the year 2017

Which equation can be used to represent "six added to twice the sum of a number and four is equal to one-half of the difference of three and the number”?

6 + 2(x + 4) = 6 plus 2 left-parenthesis x plus 4 right parenthesis equals StartFraction one-half EndFraction left-parenthesis 3 minus x right-parenthesis.(3 – x)
6 + 2(x + 4) = 6 plus 2 left-parenthesis x plus 4 right parenthesis equals StartFraction one-half EndFraction left-parenthesis x minus 3 right-parenthesis.(x – 3)
(6 + 2)(x + 4) = left-parenthesis 6 plus 2 right-parenthesis left-parenthesis x plus 4 right parenthesis equals StartFraction one-half EndFraction left-parenthesis 3 minus x right-parenthesis.(3 – x)
(6 + 2)(x + 4) = left-parenthesis 6 plus 2 right-parenthesis left-parenthesis x plus 4 right parenthesis equals StartFraction one-half EndFraction left-parenthesis x minus 3 right-parenthesis.(x – 3)

Answers

Answer:

A: 6 + 2(x + 4) = 1/2(3 - x)

What is the ratio 15 to 35 written as a fraction in lowest terms? 13 37 35 57

Answers

Answer:

Step-by-step explanation:

15:35 should be 3/7

which equation represents the relationship between x values and y values in the table
y=4x+6

y=2x+4

y=x+4

2x+12
x y
0 4
2 16
4 28
6 40
10 64

Answers

It would be y=2x+4 because if you plug in the values for x you output the y

Jennifer earns $7.60 per hour working after school. She wants to buy a musical instrument and she needs at least $500. Write an inequality that describes how many hours she must work to buy the instrument.

Answers

Answer: 7.60x ≥ 500, where x represents the numbers of hours worked.

Step-by-step explanation:

Let f (x) = 8x^2 + 4 and g(x) = -x^2+ 12x + 10. Which statements below are true for f (x) · g(x)? Select all that apply.
The constant term is 40.
The leading term is 8x^4.
The x term has a coefficient of 12.
The x^2 term has a coefficient of -76.
The x^3 term has a coefficient of 96.
The resulting polynomial has degree 4.

Answers

LCM: 16r⁴+36r²s²+81s⁴,8r³–27s³,8r²–22rs+15s²

Find the vertical horizontal and slant asymptotes if any for f(x)=2x^3+24x^2+35x-175/x^2+14x+45

Answers

Answer:

A on edge

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

took test

Need help with this thanks

Answers

Answer:

126/420

Step-by-step explanation:

you cross multipy 3/10 and x/420 then you get 1260=10x, then you divide by 10 and get 126

Christina biked 36 miles in 6 hours. If she biked at a constant speed, how many miles did she ride in one hour?

Answers

Answer:

6

Step-by-step explanation:

because you divided the amount of mile by the amount of time it took to get your answer

6 is your answer because six times six is 36

1/5 - 3/4
im giving 95 points for this so plz give me right answer

Answers

Make them equal denominator
1/5 = 4/20
-3/4 = -15/20
4/20 - 15/20 = -11/20
The answer is -11/20

find the arc length of each arc

Answers

Answer:

There is no question here.

Put the question in the replies of this answer and I'll gladly answer it for you.

Step-by-step explanation:

May I have brainliest please? :)

HELP PLZ GUYS I BEG YOU 15 PTS ITS EASYYYYYYY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Jennifer received many pieces of candy for Halloween. She decided to limit herself to only eating 4 pieces every day. On the 14th day after this decision, she had 67 pieces of candy left.

1) Write a linear equation in point-slope form based on the situation above.

2) Define each of your variables based on your equation above.

3) Determine how many pieces of candy Jennifer received on Halloween.

Answers

Answer:

1) The linear equation in point and slope form is y - 67 = -4 × (x - 14)

2) The variables are;

a) The number of candies available = y

b) The number of days Jennifer eats the candies =

c) The slope, m = -4

3) Jennifer received 123 pieces of candies on Halloween

Step-by-step explanation:

The given parameters are;

The number of candies Jennifer eats everyday = 4 pieces

The number of days for which Jennifer eats the daily 4 candies = 14

The number of candies left at the end of the 14th day = 67 candies

1) We note that the rate of decrease in the number of candies = 4 candies/day

Therefore, the slope of the linear equation is m = -4

The y-intercept = The initial amount of candies Jennifer has = c = 67 + 14× 4 = 123 candies

The linear equation in point and slope form is given as follows;

y - 67 = -4 × (x - 14)

2) The variables are;

a) The y-value represents the number of candies available on a specific day

b) The x value represents the number of days Jennifer eats the candies'

c) The slope = The rate of decrease in the number of candies per day = -4

3) The number of candies Jennifer receives on Halloween is given by the y-intercept of the straight line equation as follows;

y - 67 = -4 × (x - 14)

y - 67 = -4·x + 56

y = -4·x + 56 + 67 = -4·x + 123

y = -4·x + 123

Comparing the above equation, with the general form of the straight line equation, y = m·x + c, where, the constant term, c = The y-intercept, we have;

The y-intercept of the equation y = -4·x + 123 = 123 = The initial amount of candies Jennifer received on Halloween.

Calculate surface area of a sphere with a radius of 13.

Answers

Answer:

2123.72

Step-by-step explanation:

A=4πr2=4·π·132≈2123.71663

Answer:

2120 (rounded off to 3 s.f.)

Formula:

Surface area of sphere = 4×pi×r²

Step-by-step explanation:

Apply the formula with the radius as 13:

4×pi×13² = 4×pi×169

              = 676pi

              = 2120 (rounded off to 3 s.f.)

Divide. Reduce the answer to lowest terms.

1/5 ÷ 3/4

Answers

Answer:

4/15

Step-by-step explanation:

1/5÷3/4 is the same as 1/5•4/3 by using same, change, reciprocal.1/5•4/3=4/15.4/15 cannot be simplified any more so the answer is 4/15.

Answer:

4/15 Is the answer

Step-by-step explanation:

(4x + 13x2 +27x+6) = (4x + 1)

Answers

Answer:

x=-5/53

Step-by-step explanation:

1. Add similar elements: 4x+27x=31x

2. Multiply 13 times 2 to get 26

3. Once again add the similar elements: 31x+26x=57x

4.  Expand!!: Originally (4x+1) take away the Parentheses!!

5. 57x+6=4x+1

6. Subtract 6 from both sides: 57x+6-6=4x+1-6

7.  Simplify: 57x=4x-5

8. Subtract 4x from both sides: 57x-4x=4x-5-4x

9. Simplify: 53x=-5

10. Divide both sides by 53: 53x/53= -5/53

11. x= -5/53

show any calculations, including 180 degrees, go step by step pls.​

Answers

Answer:

120°, 120°, 60°, 60°

Step-by-step explanation:

m∠1 = 180° - 60° = 120°

m∠1 = m ∠2 (alternate interior)

m∠3 = 60° (vertical to given angle)

m∠4 = m∠3 (alternate exterior)

a positive number multiplied by a negative number equal a positive number. True or False​

Answers

Answer: False

Step-by-step explanation:

Example 3 times -3= -9

Answer: False

Step-by-step explanation:

Positive * Positive = Positive

Negative * Positive = Negative

Negative * Negative = Positive

solve the system of equations 8x+2y=6
y= -4x+3​

Answers

0,3 is the answer to this

Who ran further elena or tyler in ten minutes

Answers

Answer:

depends who the faster person is

Answer:

need more information

What would this be ?

Answers

Answer:

-8,1 mabey I don't really know

negative 3 times negative x equals?

Answers

Answer: 3x

Step-by-step explanation:

what is the parallel slope intercept form?​

Answers

y=-1/2-1 is parallel to that equation

What is the value of 6(g+2)h when g = 6 and h = 4?

Answers

Answer:

6(6+2)4

6×8×4 = 192

Answer is 192

Answer:

12

Step-by-step explanation:

6(g+2)h=6(6+2)4=6(8)4=484=12

Math: hey everyone, can anyone help me find the answer for this math question? I don’t quite understand but yea the picture is there also the question is “find the product. Simplify ur answer”

Answers

Answer:

4 1/3

I hope this helps

idk how to do this! Pls help me! I need to hurry!

Answers

I did know of the understanding of math high school?

Answer:

Step-by-step explanation:

3(x + 5) this question must be at least 20 characters long so yeah​

Answers

Answer: 3x + 15

Step-by-step explanation:

Distribute the 3 to each of the values within the paranthesis:

3 * x = 3x and 3 * 5 = 15

Combine and the solution is 3x + 15

Other Questions
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