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
marusya05 [52]
2 years ago
7

If x-y=9 and xy=2,find the value of (x square + y square)

Mathematics
1 answer:
kati45 [8]2 years ago
3 0

Answer:

x² + y² = 85

Step-by-step explanation:

Using the expansion

(x - y)² = x² + y² - 2xy , then

x² + y² - 2xy = (x - y)² ( add 2xy to both sides )

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

          = 9² + 2(2)

          = 81 + 4

          = 85

You might be interested in
The score of golfers for a particular course follows a normal distribution that has a mean of 73 and a standard deviation of 3.
Artemon [7]

Answer:

P(X \geq 74) = 0.3707

Step-by-step explanation:

We are given that the score of golfers for a particular course follows a normal distribution that has a mean of 73 and a standard deviation of 3.

Let X = Score of golfers

So, X ~ N(\mu=73,\sigma^{2}=3^{2})

The z score probability distribution is given by;

           Z = \frac{X-\mu}{\sigma} ~ N(0,1)

where, \mu = population mean = 73

           \sigma = standard deviation = 3

So, the probability that the score of golfer is at least 74 is given by = P(X \geq 74)

 P(X \geq 74) = P( \frac{X-\mu}{\sigma} \geq \frac{74-73}{3} ) = P(Z \geq 0.33) = 1 - P(Z < 0.33)

                                               =  1 - 0.62930 = 0.3707                  

Therefore, the probability that the score of golfer is at least 74 is 0.3707 .

3 0
3 years ago
Each patron can borrow up to 6 books. If all the patrons are currently holding on to 6 books each, how many books are left in th
marusya05 [52]

Answer:

3,489 + 8,617 + 1,240 – 564 x 6 = 9,962

There are 9,962 books left in the library

Hope so it helps cause it's also in my book

7 0
2 years ago
Emma is doing a 20-mile bike ride. She has cycled 11-miles so far?
prisoha [69]

Answer:

Step-by-step explanation:

55%

7 0
2 years ago
Please help me with this homework
satela [25.4K]

Answer:

45

Step-by-step explanation:

9x60=540

540/12= 45

3 0
3 years ago
Read 2 more answers
PLEASE HELP GEOMETRY !!!!!
statuscvo [17]

Answer:

x = 11.5

Step-by-step explanation:

\sin \: 35 \degree =  \frac{x}{20}  \\  \\ x = 20 \sin \: 35 \degree \\  \\ x = 11.471528727 \\  \\ x = 11.5

8 0
3 years ago
Other questions:
  • For the function f(x) = 9-xcalculate the following function values:<br> f(1) =<br> f(2)=
    12·1 answer
  • What is an equation of the line in slope intercept form? m = 4 and the y-intercept is (0, 5) (1 point)?
    15·2 answers
  • M(-5, 2) and N(5, 2) are the endpoints of the segment MN on the coordinate plane. What is the length of ?
    11·2 answers
  • CAN SOME HELP ME PLEASE IT'S DUE IN 10 MINS​
    5·1 answer
  • Pls help me answer this question from least you greatest
    7·2 answers
  • The difference between 9 thirty- sevens and 8 thirty sevens
    10·1 answer
  • HELPPP IM ALMOST DONE WITH THIS CLASS
    7·1 answer
  • Find the side length of a cube with a volume of 166 m
    12·1 answer
  • Geometry B Final Exam
    9·2 answers
  • What is trigonometry???????​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!