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
TEA [102]
3 years ago
5

D is the wrong answer please help :(

Mathematics
2 answers:
Stella [2.4K]3 years ago
8 0

This can be solved by Newton's binomial formula

Tk+1 = (n k) a∧(n-k) b∧k  k+1=7 => k=6, n=11 , a=-3x and b=-2y

T7= (11 6) (-3x)∧(11-6) (-2y)∧6 = (11*10*9*8*7)/(1*2*3*4*5) (-3x)∧5 (-2y)∧6

T7= 462 (-3x)∧5 (-2y)∧6

The correct answer is A.

Good luck!!!


Viktor [21]3 years ago
7 0

\displaystyle T_r=\binom{n}{r-1}x^{n-r+1}y^{r-1}\\\\\\T_7=\binom{11}{6}(-3x)^{11-7+1}(-2y)^{7-1}\\\\T_7=\dfrac{11!}{6!5!}(-3x)^5(-2y)^6\\\\T_7=\dfrac{7\cdot8\cdot9\cdot10\cdot11}{2\cdot3\cdot4\cdot5}(-3x)^5(-2y)^6\\\\T_7=462(-3x)^5(-2y)^6

You might be interested in
PLEASE HELP ME IM STRUGGLING!!!
Kitty [74]

Answer:

The required answer is c=7\sqrt{3}

Therefore the number in green box should be 7.

Step-by-step explanation:

Given:

AB = 7√2

AD = a , BD = b , DC = c , AC = d

∠B = 45°, ∠C = 30°

To Find:

c = ?

Solution:

In Right Angle Triangle ABD Sine identity we have

\sin B = \dfrac{\textrm{side opposite to angle B}}{Hypotenuse}\\

Substituting the values we get

\sin 45 = \dfrac{AD}{AB}= \dfrac{a}{7\sqrt{2}}

\dfrac{1}{\sqrt{2}}= \dfrac{a}{7\sqrt{2}}\\\\\therefore a=7

Now in Triangle ADC Tangent identity we have

\tan C = \dfrac{\textrm{side opposite to angle C}}{\textrm{side adjacent to angle C}}

Substituting the values we get

\tan 30 = \dfrac{AD}{DC}= \dfrac{a}{c}\\\\\dfrac{1}{\sqrt{3}}=\dfrac{7}{c}\\\\\therefore c=7\sqrt{3}

The required answer is c=7\sqrt{3}

8 0
3 years ago
Help I am being timed
Levart [38]

Answer:

Let us say  x  is a real number   and  z = a + ib  is complex

|x| > 0

|z| = |a + ib| =  square-root (a^2 + b^2)

Step-by-step explanation:

|x| > 0   the absolute value of a real number is a nonnegative real number

The |a + ib|  =  square-root of the sum of the squares of the real components of the complex number

3 0
3 years ago
What fraction of an hour is 5 minutes in its simplest form
alukav5142 [94]

Answer:

1 / 12

Step-by-step explanation:

one hour = 60 minutes

so

5 / 60

= 1 / 12

5 0
2 years ago
Read 2 more answers
Increase 2.75 by 1/4
alexgriva [62]
3.4375 is the answer
7 0
3 years ago
Read 2 more answers
Make x the subject of the formula
juin [17]

Step-by-step explanation:

first cirscross it come 2nˆ4X=3L4mˆ2and divide each by 2nˆ4 to make X alone and it come, X=3L4mˆ2/2nˆ4. try my best ,if i am wrong tell me.

5 0
3 years ago
Other questions:
  • A code consist of a two digit number chosen from 00 to 49 followed by a letter of the alphabet. What is the probability the code
    14·1 answer
  • 45÷9 + 8×3<br>Help!!!<br>use pemdas
    6·2 answers
  • Melissa is making clothes for her dolls. She has 7/8 yard of fabric. Each doll requires 2/7 of a yard of fabric. How many shirts
    7·1 answer
  • Rewards for answering the question below will be in place.
    6·2 answers
  • Tanθcscθcosθ=1 Trig Identities
    5·1 answer
  • Solve: 3a^2-4b a= -6 b= -5 If you could also leave an explanation that would be great! Thank you for your time!
    10·1 answer
  • The gestation period of humans ​(266 days) is​ _____ percent longer than the gestation period of lions (108 days).
    6·1 answer
  • How can i solve the following<br> 2(x + 3) = x - 4
    7·2 answers
  • Help plz idk I need help ASAP
    8·1 answer
  • 2s - 2 = -9 -5s combine terms and simplify
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!