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
Airida [17]
3 years ago
12

Stion Factor the difference of squares. x2 - 400 The factored form of x2 - 400 is

Mathematics
1 answer:
Sloan [31]3 years ago
3 0

Answer:

The factored form of x²-400 is (x+20)(x-20).

Step-by-step explanation:

Given the expression

x^2\:-\:400

As the square of 20 is 400. Therefore, rewrite 400 as 20²

⇒ x^2-20^2

\mathrm{Apply\:Difference\:of\:Two\:Squares\:Formula:\:}x^2-y^2=\left(x+y\right)\left(x-y\right)

Thus, the expression becomes

x^2-20^2=\left(x+20\right)\left(x-20\right)

Thus, the factored form of x²-400 is (x+20)(x-20).

You might be interested in
5-a/8=4/7 solve for a show your work
timama [110]
Subtract 5 from both sides
a/-8 = 4/7 - 5

simplify 4/7 - 5 to 31/-7
a/-8 = 31/-7

multiply both sides by 8 
-a = 31/-7 x 8

simplify 31/7 x 8 to 248/7
-a = 248/7

multiply both sides by -1.
The answer is a = 248/7

The words are the explanations of the steps and the dark bolded words are the work shown for each step.
6 0
3 years ago
In a survey of 200 professors at Gotham University, professors were asked, “Regarding your weight, do you think you are: About r
DochEvi [55]

The probability that a randomly selected professor is female and feels "About Right" is 0.40

The distribution table :

____About right _ Oweight _ Uweight __ Total

Female _ 80 _____ 39 ______ 3 _______ 122

Male ___ 52 _____ 10 ______ 16 _______ 88

Total ___ 132 ____ 49 ______ 19 _______ 200

Oweight = Overweight

Uweight = Underweight

Recall :

Probability = required outcome / Total possible outcomes

Probability that a selected professor is female and feels 'About right' :

Required outcome = number of female professors who feels 'About right' = 80

Total number of professors = 200

Hence,

P(Female and 'About right') = 80/200 = 0.40

Learn more : brainly.com/question/11234923

3 0
3 years ago
Evaluate: a-2b/c : if a = -8, b = 6.5, and c = -2.<br><br> -1.5<br><br> 10.5<br><br> -9
Mkey [24]
The answer to ur equation is  -1.5
3 0
3 years ago
Read 2 more answers
7 x 9 = (1 x 10)-(7 x A)
Ganezh [65]
X^9 is the answer to this problem.
4 0
3 years ago
Add: 3x(x-y+z) and 2y (x+y-z)​
hodyreva [135]

Answer:

3x^2 + 3xz + 2y^2 - 2yz - xy

Step-by-step explanation:

(1) multiply it to get

3x^2 - 3xy + 3xz and 2yx + 2y^2 - 2yz

add similar variables (-3xy + 2yx)

( the order of the variables doesn't matter xy or yx is the same)

we get -xy

and then after that simplifying we get 3x^2 + 3xz + 2y^2 - 2yz - xy

3 0
3 years ago
Read 2 more answers
Other questions:
  • If m&lt;6=72, then m&lt;7=
    5·1 answer
  • The difference between one-third of a number and 11 is 10.
    14·2 answers
  • Please help me with all 3 parts! :
    11·1 answer
  • Division of whole numbers 3075 divided by 3
    6·1 answer
  • A weather forecaster says the temperature will be about -5C “give or take” 10 degrees. What is the greatest possible temperature
    14·1 answer
  • The debate team participated in 18 debate it won twice as often as it lost how many times did it win
    12·1 answer
  • A polynomial function has -5+√3t as a root. Which of the following must also be a root of the function? a) -5-√3t b) -5+√3t c) 5
    13·1 answer
  • 7 to 2 = __to 6 help plz​
    9·1 answer
  • Anyone need tutoring help in a subject? My rates are only $2-$3 a session!
    7·1 answer
  • On Monday, the water was shut off 3 times for ¼ hours, 2/3 hours, and 1-3/4 hours, respectively. What was the total number of ho
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!