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
Derivative of sin11xcos11x
diamong [38]
Hello here is a solution :
f'(x) =( sin11x)'cos11x +<span>sin11x(cos11x)'
(sin(ax+b))'=a cos(ax+b)
</span>(cos(ax+b))'=-a sin(ax+b)
f'(x) = 11 cos11xcos11x-11sin11xsin11x
f'(x) = 11(cos11x)²-11(sin11x)²


6 0
3 years ago
22. The mean of 15 observations is 32. Find the resulting mean, if each observation is: (i) increased by 3 (ii) decreased by(v)
Lubov Fominskaja [6]

Answer:

35 ;

32 + v

51.2

Step-by-step explanation:

If each observations in a particular set is increased or decreased by a uniform or fixed number, the mean of the resulting output will also increase by the same amount

Hence,

For 15 observations whose mean is 32

If each observation is increased by 3, then the resulting mean will also increase by 3 ; hence, new mean = 32 + 3 = 35

If each observation is decreased by v ; the resulting mean would also decrease by v ;

32 - v

If each observation is increased by 60% ; the resulting mean will be ;

(1 + 60%) * initial mean

(1 + 0.6) * 32

1.6 * 32 = 51.2

8 0
2 years ago
PLEASE HELP!!!
Marizza181 [45]
The function would be f(x)=11,500-.16xPlug in 4 for x
8 0
3 years ago
Which represents a function? A 2-column table with 5 rows. The first column is labeled x with entries negative 10, negative 5, 0
Ratling [72]

Answer:

The 1st table represents a function

Step-by-step explanation:

Just trust me on this I took the quiz on edge 202 and got it right

the graph is

x     |     Y

--------------

-5   |  -22

--------------

0    |  -2

------------

3    |  10

7 0
3 years ago
6. RVHS sold 143 Adult and Student tickets to the
slava [35]

Answer:

57 adult tickets, 86 student tickets

7 0
2 years ago
Other questions:
  • What is the inverse function of f(x) = (x+4)/(x-2) ?
    5·1 answer
  • Match the following items help me plz ASAP
    9·2 answers
  • Mimi needs eleven 18-inch pieces of rhinestone ribbonShe purchased 5 yards of the ribbon shown at the rightIf Mimi purchases the
    10·2 answers
  • Express 8% as a fraction
    11·2 answers
  • If x/5+6=-14, then x=
    9·2 answers
  • What is 3 over 5 + 1 over 9
    8·1 answer
  • What is the slope and y intercept of the linear function graphed below? Answer slope as m = ______________; answer y intercept a
    9·1 answer
  • Jackrabbits are capable of reaching speeds up to 40 miles per hour how fast is this per second
    14·2 answers
  • PLEASE HELP!!!!<br> I did the math and I got 84, is it correct?
    15·2 answers
  • A map of Atlanta has a scale of 1.5 inches to 0.75 miles.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!