4x^2+2x-1=0 in quaratic equations

Answers

Answer 1

Answer:

Step-by-step explanation:

"quaratic" should be "quadratic."

The coefficients of this quadratic are 4, 2 and -1.  Thus, the discriminant is

b^2 - 4ac, or here, 4 - 4(4)(-1) = 20

Since the discriminant is positive, our quadratic has two real, different roots.

                                -2 ± (√4)(√5)

The roots are:  x = ---------------------

                                       2(4)

                                    -1 ± √5

This reduces to   x = ---------------

                                           8


Related Questions

What is AB?

Triangle ACB is right angle triangle. The length of AC is 12 and BC is 35.

Answers

Answer:

the answer is 35

Step-by-step explanation:

because if BC is 35 that means AB will have to be that same because it's a triangle

The required value of AB is 33 units for the given right triangle.

What is the right triangle?

A right triangle is defined as a triangle in which one angle is a right angle or two sides are perpendicular.

Triangle ACB is a right-angle triangle. The length of AC is 12 and BC is 35.

Pythagoras's theorem states that in a right-angled triangle, the square of one side is equal to the sum of the squares of the other two sides.

Assume BC is the hypotenuse,

Since this is a right triangle, use the formula AB² + AC² = BC² and substitute values of AC = 12 and BC = 35.

AB² + AC² = BC²

AB² + (12)² = (35)²

AB² + 144 = 1225

AB² = 1225 -144

AB² = 1081

AB = 32.8785

Rounded to two decimal places,

AB = 33 units

Therefore, the required value of AB is 33 units.

Learn more about Pythagoras's theorem here:

brainly.com/question/343682

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What type of function will fit these data points?

Linear
Quadratic
Exponential
None of the above

Answers

Answer: quadratic

Step-by-step explanation:

I guess if you can search up a picture of each function, you will be able to understand it. A linear graph is linear (as its name suggests), as a result, it never "goes back" to the value that has showed up. For example, the linear function y=3x+2. If you plug in a random value of y (let's say 10), then solve for x, you will only get 1 value of x. The data table that you have indicates that the y value of 0 has appeared twice. Thus, the function cannot be linear. The same thing applies to an exponential function. A quadratic function, however, can have to x values that result in the same y value. For example, the function y = [tex]x^2[/tex]-1. When you set y equal to zero....

0 =  [tex]x^2[/tex]-1

0 = (x+1)(x-1)

x = -1 or 1.

Hope this helps :)

Someone please help me.

Answers

Answer:

with what life

Step-by-step explanation:

which would result in an integer

Answers

Answer:

c I think but I am not sure but I hope you have a good day

HELP ASAP PLZ!!! Question in picture!

Answers

Answer:YOUR ANSWER IS C

Step-by-step explanation:

Answer:

y=11/2x-10

20 character minimum

Write a simplified polynomial expression that can be used to represent the perimeter of the rectangle. 3x-7 and x-7​

Answers

Answer:

P = 8x-28

Step-by-step explanation:

Given that,

Length = (3x-7)

Width = (x-7)

We need to find the perimeter of the rectangle. The formula for the perimeter of a rectangle is given by :

[tex]P=2 (l+b)\\\\P=2(3x-7+x-7)\\\\P=2(4x-14)\\\\P=8x-28[/tex]

So, the perimeter of the rectangle is equal to 8x-28.

The table shows the amounts A (in billions of dollars) budgeted for national defense for the years 1998 to 2004.

Answers

Ok ahhh thank u po


Sana all
Sana talaga

It costs $3 per hour to park in a parking lot, with a maximum cost of $12.

Explain why the amount of time a car is parked is not a function of the parking cost.

Answers

Answer:

It is not a function because there is a maximum.

Step-by-step explanation:

With 12 as the maximum it will not go on forever and functions do.

I need help on this question it's confusing

Answers

Answer:

Well what's the question lol

Answer:

show the question

Step-by-step explanation:

HELP ME UNSCRAMBLE THESE WORDS PLEASE!!! IGNORE THE SUBJECT I JUST DIDN'T KNOW WHAT TO PICK!! THANK YOU LOVELIES!!!

Answers

1) Play

2)Dribble

3)Paint

4)Center

5)Assists

6)Perimeter

7)Benchwarmer

8)Aboard

9)Technical

10)Rebound

11)Penalty

12)screen

13)Overtime

14)guard

15)? Host

16)Quarter

17) Bounce

18)Swish

19)Halftime

20)Backcourt

Question is in picture

Answers

Answer:

the answer will be 14,3 ok but check it

What’s the answer????

Answers

Answer:

I believe its 10 but forgive me if I'm wrong

48/6 = 8 highlights in each box

Please answer correctly! I will mark you Brainliest!

Answers

20-10=10

10-3=7

7cm

Then the volume is 7cm

Step-by-step explanation:

volume of cuboid=lbh =10*3*20 =600cm3

If the ratio of shirts to jeans is 5 : 3 and the no. of shirts are 15, what is the no. of jeans?

Answers

Answer:

9

Step-by-step explanation:

let x be number of jeans

3/5 = x/15

x=(3/5)15

x=9

Answer:

9 jeans

Step-by-step explanation:

The 5 part of the ratio relates to 15 shirts , then

15 ÷ 5 = 3 ← value of 1 part of the ratio , then

3 parts = 3 × 3 = 9 ← number of jeans


The perimeter of a rectangle is 20m and the length is x m find the
area of the rectangle in terms of x

Answers

Answer:

2(x+y)

Step-by-step explanation:

perimeter=20cm

length=x

Take the radius to be y

area of a rectangle=2(length+width)

therefore area of a rectangle=2(x+y)

87392 rounded off to the nearest 5​

Answers

i think the answer is 87395:)

The given number 87392 is rounded off to 87390.

What is meant by "rounding off"?

Rounding off means a number is made simpler by maintaining its overall value but being closer to the next number.

The number to be rounded off is 87392.

The digit present in the once place is 2.

If the smallest place digit is greater than or equal to 5, then round up the digit.

As the digit in the smallest digit is less than 5, the digit gets rounded down.

Here, the smallest place digit is 2 which is smaller than 5.

So, the given number rounded off to 87390.

Hence, the answer is 87390.

To learn more about rounding off, use the link given below:

https://brainly.com/question/13391706

#SPJ6

Help Please! Find The Circumference Of A Circle With D=22.1.

Answers

Answer:

72.25663

Step-by-step explanation:

C=2πr=2·π·11.5≈72.25663

1/4x + 6 = 1/2 (x+4)

Answers

Answer:

Solution x=16

Step-by-step explanation:

Hey Guys,.I just wanted to check. Is this correct? :V​

Answers

Answer:

It's correct.

Step-by-step explanation:

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

A.
f(x) = -4|x + 2| + 3
B.
f(x) = 4|x + 2| + 3
C.
f(x) = -4|x − 2| − 3
D.
f(x) = 4|x + 2| − 3

Answers

Answer:

D

Step-by-step explanation:

what is the sum of 3x4

Answers

Answer:

12

Step-by-step explanation:

3 4's

3+3+3+3=12

Hope that helps :)

The sum of this question is 12

25 POINTS - Need ASAP . Answer word problem attached.

If you answer just for points I won’t hesitate to report so don’t try pls!

Answers

Answer:

0.82

Step-by-step explanation:

82/100 as a fraction is equal to 0.82

0.82 is the answer to ur question

Pls help! 100 points and im giving brainliest!! Plss help fast!!

Answers

Answer:

A. the first one is true because when x = 5, 4x - 1 equals 19. The second inequality doesn't allow for it to equal 19.

B. 9 is the value that makes the equation true. See below for work to show.

Step-by-step explanation:

4x -1 </= 19 is true because it's "less than or equal to" and when you change the x to 5, the answer is exactly 19.  4(5) - 1 = 19. The other sentence is "4x - 1 is less than 19", and that means it can't equal 19 for that sentence to be true.

Math + words = confusion sometimes. Does that make sense?

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

Now let's solve

5x + 2 = 47

Subtract 2 from both sides

5x = 45

divide both sides by 5

x = 9

Please lmk if you have questions.

Can someone please explain what Multiplying Monomials and Binomials is like a summary please quick

Answers

Answer:

quite simple

Step-by-step explanation:

When multiplying a monomial by a monomial, multiply the coefficients and then multiply the variables. When multiplying variables that are the same, use the product of powers property to add the exponents. When multiplying a monomial by a binomial, multiply the factors of the monomial into each term of the binomial.

2. Consider a sequence where f(1) = 1,f(2) = 3, and
f(n) = f(n − 1) + f(n − 2).

List the first 5 terms of this sequence.

Answers

Answer:

24,27,30 and 33 and so on

Step-by-step explanation:

The first 5 terms of this sequence represented by f(n) = f(n − 1) + f(n − 2). is 1, 3, 2, -1 and -3

What is a function?

A function is an expression that shows the relationship between two or more variables and numbers.

Given the function:

f(n) = f(n − 1) + f(n − 2)

f(1) = 1, f(2) = 3

f(3) = f(2) - f(1) = 3 - 1 = 2

f(4) = f(3) - f(2) = 2 - 3 = -1

f(5) = f(4) - f(3) = -1 - 2 = -3

The first 5 terms of this sequence represented by f(n) = f(n − 1) + f(n − 2). is 1, 3, 2, -1 and -3

Find out more on  function at: https://brainly.com/question/25638609

Help with number one only,no bad answers or links please.

Answers

Answer: 180 ft^3

Step-by-step explanation:

Answer: 180 ft is the answer

Step-by-step explanation:

Please help me find the value of x for this trig question

Answers

Answer:

11.330

Step-by-step explanation:

Answer:

x=11.3

Step-by-step explanation:

Hello There!

We can use trigonometry to solve for x

Remember these are the trigonometric ratios

SOHCAHTOA

Sin = Opposite over Hypotenuse

Cos = Adjacent over Hypotenuse

Tan = Opposite over Adjacent

We can use the angle that has a measure of 31 degrees

We are given the hypotenuse and we need to find its opposite side

hypotenuse and opposite corresponds with sine so we will use sine to create an equation

(remember sin = opposite over hypotenuse)

[tex]sin(31)=\frac{x}{22}[/tex]

now that we have created an equation we solve for x

step 1 multiply each side by 22

[tex]sin(31)*22=22sin(31)\\\frac{x}{22} *22=x\\x=22sin(31)\\sin(31)=0.5150380749\\0.5150380749*22=11.33083765\\x =11.33083765[/tex]

finally we round to the nearest tenth and get that x = 11.3

Please help thanks!!!

For question 3, you don’t need to calculate it. Please explain the steps of how you would work it out.

Answers

Answer:

30 or 780 is your answer for the first one. i dont know how to work out the answer for the 2 one im sorry :(

Step-by-step explanation:

13+12+5 = 30

13 x 12 x 5 = 780

I would go for 780

it seems more like to be the answer

The circumference of a circle is 127 cm. What is the area,
in
square centimeters?
Express your answer in terms of Pi.

Answers

A≈ 1283.51
I hope this will help u

Bridgette has already taken 7 pictures at home ,and she expects to take 1 picture during everyday of vacation. How many days will Bridgette have to spend on vacation before she will have taken 9 pictures?

Answers

Answer:

I believe she would have to spend 2 days on vacation.

Step-by-step explanation:

She already have 7 pictures and she takes 1 a day. Therefore, she would have to spend 2 days on vacation to get 9 pictures.

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