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
Nezavi [6.7K]
3 years ago
12

Solve x^2-4=77 E2020

Mathematics
2 answers:
Natali [406]3 years ago
7 0

Answer:

x = 9  or  x = -9

Step-by-step explanation:

x² - 4 = 77

then

x² - 4 + 4 = 77 + 4

then

x²  = 81

then

x² - 81 = 0

then

x² - 9² = 0

then

(x - 9)(x + 9) = 0

then

x - 9 = 0  or  x + 9 = 0

then

x = 9  or  x = -9

__________________________

:)

Oxana [17]3 years ago
3 0

Answer:

Step-by-step explanation:

You might be interested in
20 pupcakes<br>15 pupcakes <br>30 pupcakes<br>25 pupcakes​
Lemur [1.5K]

Answer:

20

Step-by-step explanation:

You will do 60/3 and you will get 20

4 0
3 years ago
Read 2 more answers
What is the value of x in the figure shown below
lesya [120]

Answer:

x = 30 degrees

Step-by-step explanation:

These triangles are perfectly symetrical. This is shown by the length of sides given in the problem. Since the triangle is symetrical, E is equal to B just as D is equal to C. Since B is 30 degrees, we can tell that E is also 30 degree.

5 0
3 years ago
I dance I sing I am perfect I am I am a believer that I am a discoverer. PLEASE ANSWER I'LL MARK AND BRAINLIEST
Julli [10]

Answer:

not sure if its a song or not but you do you, gg <3

5 0
2 years ago
Read 2 more answers
Oceanside Bike Rental Shop charges a sixteen dollar fixed fee plus six dollars an hour for renting a bike. Dan paid fifty two do
bearhunter [10]
$52 - $16= $36
$36/6 = 6 hours
8 0
3 years ago
Which of the following is most likely the next step in the series?<br>​
Andrej [43]

Answer:

B

Step-by-step explanation:

They are increasing by 1 vertically. Hope this helps!! :)

5 0
3 years ago
Read 2 more answers
Other questions:
  • A baby gains 11 pounds in its first year of life. The baby gained 4 1/4 pounds during the first four months and 3 1/2pounds in i
    10·2 answers
  • Which is the equation of the function?
    15·2 answers
  • HELPPPPP !!!!! Answers ????
    9·2 answers
  • Evaluate g(x)=1/5(1/3)^x for x=2
    7·1 answer
  • Solve this equation, and show work. worth 40 points.
    8·1 answer
  • . Estimate the sum of 405 and 385 by<br>rounding to the nearest hundred. Explain<br>​
    5·2 answers
  • A bag contains 3 green marbles and 8 white marbles. Suppose a marble is randomly selected. What are the odds in favor of picking
    14·2 answers
  • What does similar mean
    11·1 answer
  • I’m in dyer need of the answer to this problem please help!!
    15·1 answer
  • If a and b are independent events, p(a)=0. 20, and p(b)=0. 80, what is p(b|a)?.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!