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
brilliants [131]
3 years ago
8

Which of the following is the third term of the expansion (a + b)^n ?

Mathematics
1 answer:
Luba_88 [7]3 years ago
5 0

Answer:

  C(n, 2)a^(n-2)b^2

Step-by-step explanation:

Generally, the expansion is written in decreasing powers of "a", so the first few terms would have variable constellations that look like ...

  a^n, a^(n-1)b, a^(n-2)b^2, ...

The coefficients would be (in order), C(n, k) for k increasing from 0, so the coefficient of the 3rd term would be C(n, 2).

You might be interested in
6. Write an algebraic expression for the word phrase 5 times the product of x and y
Lena [83]

Answer:

5+x=y ,x-y=5,y-x=5,5-x=y,y+5=x

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The graph of a quadratic function has a vertex at the point (8,6). It passes through the point (-4,-5). Which of the following e
Mandarinka [93]

Answer:

y= -11/144(x-8)^2+6

Step-by-step explanation:

This equation can be represented in vertex form, which is:  

y=a(x-h)^2+k

If we plug in 8 as h and 6 as k we get the following equation:

y=a(x-8)^2+6

Now we have to plug in x and y. We can use the other point (-4,-5) and plug it into the equation and get:

-5=a(-4-8)^2+6

Once we solve this we get a= -11/144

Now we have to plug in -11/144 into the original equation to get

y = -11/144 (x-8)^2 + 6

6 0
2 years ago
John works for four hours at $15/hour. he then buys two CD's at $13.25 each. how much money does John have left
Travka [436]
$15 x 4 hrs = $60 in wages.

$13.25 x 2CD's = $26.50.

$60 - 26.50 = $33.50 left
7 0
3 years ago
If Tom’s baby sister adds 5 pounds to her weight, she will be 25% heavier
Juliette [100K]
5 is 25% of ___  or   5=.25*x   

so 5 divided by .25 is your answer
5 0
3 years ago
A building is 4,500 feet tall while the scale model of the mountain is 15 inches tall. What is the scale factor?​
Natasha_Volkova [10]

Answer:

I think it is 300.

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Find the value of Z in the following equation 8Z =64
    15·2 answers
  • The formula h = 120t - 16t<img src="https://tex.z-dn.net/?f=%5E%7B2%7D" id="TexFormula1" title="^{2}" alt="^{2}" align="absmiddl
    14·1 answer
  • Perimeter of rectangle is 48 inches area is 40 inches what are the length of the side
    10·1 answer
  • Halpppppppppppp i don't understand this... &lt;:
    13·1 answer
  • Surf board: $281.39 Tax Rate: 6% What is the final price of the product after a tax is applied?
    14·1 answer
  • 234 is 45% of what amount
    9·1 answer
  • Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.
    15·1 answer
  • You buy magazines for $5 and books for $10. You spent a total of $100. Let x represent the number of magazines and y represent t
    13·1 answer
  • Helppp please I have a 25 in math
    8·1 answer
  • Help do y’all know this! Please if u do i need the answer
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!