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
seropon [69]
2 years ago
11

Solve the equation by completing the square round to the nearest hundredth is necessary x^2-x-7=0

Mathematics
1 answer:
masha68 [24]2 years ago
4 0

The answers are 3.19 or -2.19.

In order to complete the square, you must first get the constant to the other side of the equation. WE do that by adding 7 to both sides.

x^2 - x - 7 = 0

x^2 - x = 7

Now we must take half of the x coefficient (-1), which would be -.5. Then we square it and add it to both sides. This is the second step to any completing the square problem.

x^2 - x = 7

x^2 - x + .25 = 7.25

Now that we have done that, the left side will be a perfect square so that, we can factor it.

x^2 - x + .25 = 7.25

(x - .5)^2 = 7.25

After having done that, we can take the square root of both sides

(x - .5)^2 = 7.25

x - .5 = +/-\sqrt{7.25}

Now we can take the value of that square root and solve.

x - .5 = +/-\sqrt{7.25}

x - .5 = +/-2.69

x = .5 +/- 2.69

And with the + and - both there, we need to do both to get the two answers.

.5 + 2.69 = 3.19

.5 - 2.69 = -2.19

You might be interested in
What is 8587 divided by 12
azamat
The answer is <span>715.583333333

</span>
8 0
3 years ago
Y=x^{2}+2x-1<br> find the following<br> AOS, Vetex,Roots,Domain,Range, postive/negative, y-intercept
DiKsa [7]

Answer:

Step-by-step explanation:

3 0
3 years ago
Bro how do i do geometry
dimulka [17.4K]

Answer:

Diagram for success. ...

Know your properties and theorems. ...

Understand Euclid's postulates. ...

Learn the language of math. ...

Know your angles. ...

Know your triangles. ...

Figure out what you want and what you're given. ...

Now fill in the rest.

Step-by-step explanation:

8 0
3 years ago
I really need some help on this question
Leya [2.2K]

Answer:

What is the car's rate in kilometers per minute?

0.9\frac{km}{min}

How many kilometers will the car travel in 5 minutes?

4.5\ km

Step-by-step explanation:

If we know:

\frac{54\ km}{1\ hour}

And there are 60 minutes in an hour:

\frac{1\ hour}{60\ minutes}

We can do:

\frac{54\ km}{1\ hour} * \frac{1\ hour}{60\ minutes} = \frac{54\ km}{60\ minutes} = 0.9 \frac{km}{min}

From here, we figure out the distance from minutes:

0.9\frac{km}{min} * 5 = 4.5\ km

3 0
2 years ago
Christine worked from 8:15 AM to 11:50 AM, went to lunch, then worked from 12:45 PM to 5:15 PM on Monday through Friday of this
velikii [3]

The equation illustrated shows that the gross pay will be $97.

<h3>How to compute the value?</h3>

It should be noted that she earns an hourly rate of $17.15 and receives time and a half for overtime. The number of hours will be 3 hours 35 minutes at first. This will be:

= (17.15 × 3.58)

= 61.5

The amount for overtime will be:

= (1/2 × 17.15) × 4.5

= 35.59

The Total amount will be:

= 61.5 + 35.59

= $97

Learn more about equations on:

brainly.com/question/2972832

#SPJ1

6 0
1 year ago
Other questions:
  • What is the Surface area of a square pyramid if
    13·1 answer
  • In the figure, angle B measures 44°, angle A measures 62°, and angle E measures 50°.
    14·1 answer
  • Solve for x.
    14·2 answers
  • Jndxihdhwquihxois2njknz'oqwjskzlnzljx
    9·2 answers
  • Explain why animals can hear sounds humans can't
    12·2 answers
  • Carol bought 24 stamps for $6, and Charles paid $13 for 52 stamps. If the amount paid for the stamps is proportional to the numb
    7·2 answers
  • Out of a group of 250 pupils, 10 pupils could not join the school's excursion due to illness.
    6·1 answer
  • Please solve this math problem... I will mark you brainliest
    5·1 answer
  • What is the exact volume of the cone
    5·1 answer
  • Competitive firms that earn a loss in the short run should
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!