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
Practice
TEA [102]

Answer:

B. -0.5

Step-by-step explanation:

I calculated it logically

4 0
3 years ago
Which is an asymptofe of the graph the function y=cot(x-2π/3)
Shalnov [3]

Hello.


C) x=4π/3


The variable x in the cotangent argument has a unit coefficient, so the period is π, just as it is in the parent function cot(x).


Can you graph y = cot(x)? By subtracting the constant π/6 from the argument, that graph is translated to the right by π/6. Just as with cot(x), it is decreasing everywhere.


Have a nice day



5 0
3 years ago
I'm so confused. Please help I tried the first time got 50 some thing then 33 then 20.25. How do I do this?
vazorg [7]

Answer:

Basically, you have to think: more bricks : more time

more workers : less time

2,400 bricks 6 workers takes 18 hours

You now have to solve for 4,500 blocks and 10 workers

4,500 / 2,400 = 1.875 (times greater)

10 / 6 = 1.666666666 (times less)

So, we get 18 hours, multiply it by 1.875 and divide it by 1.666666666

which equals 20.25 hours

So, it seems you were correct on your third try.


Step-by-step explanation:


5 0
3 years ago
HELP ME PLZ SO VERY PLZ PLZ
yaroslaw [1]
The value of x will be 23
3 0
3 years ago
Read 2 more answers
Order the numbers from least to greatest.<br><br> 1.25, 11, -0.41, -0.41111..., -16, 3/7
Zepler [3.9K]

Answer:

- 16 <  - 0.41111... <  -0.41 <  \frac{3}{7}  < 1.25 < 11

Step-by-step explanation:

\frac{3}{7}  = 3 \div 7  = 0.428...

5 0
3 years ago
Other questions:
  • 16. For quadrilateral ABCD, determine the most precise name for it. A(2,3), B (12,3), C(8,6) and D(5,6). Show your work and expl
    13·1 answer
  • Seeman bought 2 wholes 1/5 pound of carrot for 6.60 at that
    14·1 answer
  • -25 - 6k + 7=6(1+ 3k)<br><br> Solve the equation for The Variable
    14·2 answers
  • PLEASE HELP !!!!!!! WILL MARK BRAINLIEST FOR A REAL ANSWER
    11·1 answer
  • Which type of sequence is shown? Check all that apply. 4, 8, 12, 16, . . . The numbers are quickly getting larger, so this is a
    9·1 answer
  • Fifteen is six more than a number.
    10·1 answer
  • Math homework I need answers now
    6·1 answer
  • What is the length x of PQ
    12·1 answer
  • Bonjour, aidez moi svp .c'est sur la 1er guerre mondiale 1914
    7·1 answer
  • Please simplify 4a^3 x b^3 / 2ab^2
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!