1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alika [10]
3 years ago
14

Which equation has the solutions X=1 +-SQRT 5?

Mathematics
2 answers:
Vesna [10]3 years ago
8 0

Answer:

D is correct. x^2-2x-4=0

Step-by-step explanation:

We are given the root of the equation

x=1+\pm \sqrt{5}

If we are given solution of the equation then find equation using formula.

If a and b are the solution of equation then equation would be (x-a)(x-b)=0

Here, a=1+\sqrt{5} , b=1-\sqrt{5}

Equation form would be (x-1-\sqrt{5})(x-1+\sqrt{5})=0

Now we simplify the above equation to get correct option.

x^2-x+x\sqrt{5}-x+1-\sqrt{5}-x\sqrt{5}+\sqrt{5}-5=0

x^2-2x-4=0

So, D is correct.  x^2-2x-4=0

Natali [406]3 years ago
8 0

Answer: D

Step-by-step explanation:

2020edg

You might be interested in
Log 200 ~ 2.301<br> Write in exponential form
Luda [366]

Answer:

It can't be answered because it has to have a variable or number after log200 because that's how you get 2.301.

Step-by-step explanation:

Give me the variable or number and I'll answer it from there.

6 0
3 years ago
I really need help with this angle of elevation and depression
AnnyKZ [126]

Answer:

Step-by-step explanation

But the question does not say exactly what should be solve for.

3 0
3 years ago
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of
Tanzania [10]

Answer:

17.11%

Step-by-step explanation:

since 43.2 months is the mean, and the standard deviation is 7.7 months

that means if we take the z score:

z=(36-43.2)/7.7

now that we know how many standard deviations you are away from the mean: -0.9351

using the zscore table you can find the proportion, or you can use the calculator if you have one that can do that.

you get 0.1711 which in percentages is 17.11%

7 0
3 years ago
Need help <br> Choices<br> 4<br> 3<br> 2<br> 1
-Dominant- [34]

Answer:

1

Step-by-step explanation:

The amplitude is the maximum distance away from the middle of the wave. Here we can see that the middle of the wave is the x axis and the farthest point (largest difference between the y coordinate of the x-axis, or the line y = 0, and the wave) is 1 unit away.

4 0
3 years ago
Read 2 more answers
92.4 is 150% of what number?
Ad libitum [116K]
1. We assume, that the number 92.4 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 92.4 is 100%, so we can write it down as 92.4=100%. </span>
<span>4. We know, that x is 150% of the output value, so we can write it down as x=150%. </span>
5. Now we have two simple equations:
1) 92.4=100%
2) x=150%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
92.4/x=100%/150%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 150% of 92.4

92.4/x=100/150
<span>(92.4/x)*x=(100/150)*x       - </span>we multiply both sides of the equation by x
<span>92.4=0.666666666667*x       - </span>we divide both sides of the equation by (0.666666666667) to get x
<span>92.4/0.666666666667=x </span>
<span>138.6=x </span>
x=138.6

<span>now we have: </span>
<span>150% of 92.4=138.6</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • HOLA FELLOW AMERICANS I AWAIT YOUR ASSISTANCE
    8·2 answers
  • Solve for the variables?
    12·1 answer
  • There are 85 children in a school
    5·1 answer
  • A circular pond has a radius of 3 feet. What is the approximate distance around the edge of the pond?
    15·2 answers
  • Express the set using the roster method.
    15·1 answer
  • 10. What is the equation of the line perpendicular
    10·2 answers
  • Can someone please help me answer this question asap thank you
    5·1 answer
  • What is 3x + 7x + 10<br><br><br> fastfastfastfasy
    9·2 answers
  • Angle ABC and Angle DBE are vertical angles. Angle ABC measures (7x - 5) degrees and Angle DBE measures -2(x - 11) degrees. What
    5·1 answer
  • i just need a little help with this not all questions have to be answered i just want to know how to find it.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!