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
zvonat [6]
3 years ago
12

Factorise (x+y)^2-(4-x)^2​

Mathematics
1 answer:
vovikov84 [41]3 years ago
4 0

Answer:

by using the identity a square - b square = (a+b)*(a-b)

a = x+y

b=4-x

= (x+y + 4-x)(x+y - 4-x)

y+4 * x+y -4+x

y+4*2x+y-4

2xy+y square -4y + yx + 4x + 4y - 16 +4x

3xy +y square + 8x -16

Step-by-step explanation:

You might be interested in
When sampling from a population, the sample mean will: Group of answer choices always be closer to the population mean as the sa
Radda [10]

Answer:

When sampling from a population, the sample mean will: be closer to the population mean as the sample size increases.

Step-by-step explanation:

The sample mean is not always equal to the population mean but if we increase the number of samples then the mean of the sample would become more and more closer to the population mean.

Usually the population size is very huge that is why we select a random sample from the population, care must be taken to ensure randomized sampling otherwise results would not be accurate. After that we have to make sure that the number of samples are enough for the given population size. The number of samples depends upon the shape of the population. If the population is normal than according to central limit theorem, a less number of samples would be enough to ensure normal distribution of sampling mean, otherwise a greater sample size will be required.

8 0
3 years ago
Plz help, will mark brainliest!
eimsori [14]

Answer:

the answer is "B" (thank me later) ;))

8 0
2 years ago
Read 2 more answers
The angles of a quadrilateral measure 80, 100, 100, 80 in this order what kind of quadrilateral has this shape what attributes h
Harrizon [31]

Answer:

Isosceles trapezoid

Step-by-step explanation:

-An isosceles trapezoid is also sometimes called a convex quadrilateral.

-It properties include:

  • A line of symmetry can often bisects a pair of opposite sides.
  • It has to obtuse alternating with each other after which a pair of acute angles alternate with each other i.e 80°, 80°,100°,100°
  • It has a trapezoidal shape which by definition has a two pair of parallel sides.
  • The angles on it's base or ceiling are equal hence the name Isosceles Trapezoid.

8 0
3 years ago
The cube of the sum of a number and 3.
Verdich [7]
The answer is 3! You got this!
3 0
2 years ago
To rent a canoe costs $15 for the first hour and $12 for each additional hour or fraction of an hour. Which point is NOT include
pogonyaev

Answer:

A

Step-by-step explanation:

(2.5,39)

8 0
3 years ago
Other questions:
  • Please help me with this question!!!
    13·1 answer
  • A fair coin to tossed in the air four times if the experimental probability of landing on tails is 1/4,then what is the differen
    14·1 answer
  • X=−4a 2 +3ab+12b 2 Y=9a 2 +ab−7b 2 ​ Y+X=Y+X=Y, plus, X, equals
    12·1 answer
  • Help i need help with this question
    5·1 answer
  • PLEASE HELP!!!! 30 POINTS!!
    11·1 answer
  • The formula for compound interest is:
    6·1 answer
  • A local shop sold a combined total of 707 hamburgers and cheeseburgers on monday. there were 57 more cheeseburgers sold than ham
    7·1 answer
  • What does m represent in the equation y = mx + b?
    13·2 answers
  • You work two jobs. You earn $11.90 per hour as a salesperson and $10.50 per hour stocking shelves. Your combined earnings this m
    11·1 answer
  • Which letter on the number line represents the number 2.3?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!