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
boyakko [2]
2 years ago
15

If x-y=9,x²+y²=27,then xy=?​

Mathematics
1 answer:
Tresset [83]2 years ago
5 0

Answer:

xy = - 27

Step-by-step explanation:

Note that

(x - y)² = x² - 2xy + y² ← substitute given values, that is

9² = 27 - 2xy

81 = 27 - 2xy ( subtract 27 from both sides )

54 = - 2xy (divide both sides by - 2 )

- 27 = xy

You might be interested in
What are transversals
AlexFokin [52]

Answer: In geometry, a transversal is a line that passes through two lines in the same plane at two distinct points.

6 0
3 years ago
Read 2 more answers
The calculator has a broken 1 key and broken 7 key ,and a broken plus key .Write at least on way to make each of the following n
svet-max [94.6K]
To get 17, you could do 20-3.
To get 41, you could do 50-9.
And to get 71, you could do 80-9.
7 0
3 years ago
Which of the following expressions represents "no more than 5"?
777dan777 [17]

Answer:

Ox>5

x is less than 5

means nothing more than 5 but anything less than 5

5 0
3 years ago
Math help pls!!<br> i have no clue how to do this
REY [17]

Answer:

I THINK it's A

Step-by-step explanation:

6 0
3 years ago
A building has 40 apartments on 5 floors<br><br> what is the unit rate?
Anna71 [15]

Answer:

8 is the right answer

Step-by-step explanation:

because 40 devided by 5 is 8

5 0
3 years ago
Read 2 more answers
Other questions:
  • "Princess Tower" in Dubai is considered the world's tallest residential building, towering to 101 floors! T(N) models the number
    15·2 answers
  • PLEASE HELP I GIVE THANKS
    6·1 answer
  • What is f(3) for f(x) = 3x + 2
    8·2 answers
  • Which polynomial is in standard form?
    12·2 answers
  • Mark computer weighs 35.769 pounds rounde to the nearest hundreds
    12·1 answer
  • Subtract. 12.94 - 2.62 (Round your answer to the nearest hundredths place.​
    14·2 answers
  • What is the answer to this?
    8·1 answer
  • H-E-L-P M-E please ​
    14·1 answer
  • Simplify the expression 3^-8 x 3^4
    11·1 answer
  • Find All Real Square Roots Of 144
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!