3 years ago

Anyone got an answer for this math question?

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

6 0

Answer:

So you have a scale

you multiply: 8×(3/4)

And your x= 6

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What is the coefficient of the third term in the binomial expansion of (a + b)6? 1 15 20 90

Sholpan [36]

Answer: 15

Step-by-step explanation:

(r+1)th term of $(a+b)^n$ is given by:-

$T_{r+1}=\ ^nC_r(a)^{n-r}b^r$

For $(a+b)^6$ , n= 6

$T_3=T_{2+1}=\ ^6C_2(a)^{6-2}(b)^2\\\\$

$=\ \dfrac{6!}{4!2!}a^4b^2\ \ \ [^nC_r=\dfrac{n!}{r!(n-r)!}]\\\\=\dfrac{6\times5\times4!}{4!\times2}a^4b^2\\\\=3\times5a^4b^2\\\\ =15a^4b^2$

Hence, the coefficient of the third term in the binomial expansion of $(a+b)^6$ is 15.

3 0

3 years ago

Read 2 more answers

80 PTS!!!

timama [110]

It’s c

8 squared is 64
If you multiply that by 4 you will get 256 pi
You will not have to approximate it.

6 0

1 year ago

What is the sum of r + s when r = –17.6 and s = 12.2? A. –29.8 B. –5.4 C. 5.4 D. 29.8

tankabanditka [31]

C. -5.4 -17.6+12.2= -5.4 because -17.6 goes first in the calculator but also its a negative

8 0

3 years ago

Which ratio forms a proportion with 2/9<br> 10/40<br> 12/63<br> 12/45<br> 14/63

Nostrana [21]

Answer:

14/63

Step-by-step explanation:

(2*7) / (9*7) = 14/63

5 0

3 years ago

Find the missing length for the right triangle described below. B = 21 ft, c=27 ft. Find side a. Round to the nearest whole numb

maksim [4K]

Answer:

16.97 ft

Step-by-step explanation:

According to the scenario, computation of the given data are as follows,

Side B = 21 ft

Side c = 27 ft

As we know, formula for right triangle is as follows,

$a^{2} + b^{2} = c^{2}$

$a^{2} = c^{2} - b^{2}$

So, by putting the value in the formula, we get,

$a^{2} = 27^{2} - 21^{2}$

$a^{2}$ = 729 - 441

$a^{2}$ = 288

a = 16.97 ft

Hence, the length of the side for the right triangle is 16.97ft.

6 0

2 years ago