3 years ago

Physical properties can be used to compare and classify substances. The process below demonstrates a physical property of sugar.

1 answer:

3 0

???????? Multiple choice

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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.

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3 years ago

lianna [129]

Q- A $420 55' flat screen tv is on sale for 40%, what is the cost of the flat screen tv now?

A-168 the tv now cost $168 dollars

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3 years ago

V125BC [204]

7.2 is answer thanks

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2 years ago

pantera1 [17]

Answer:

3 out of 13 chance of getting grey socks

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3 years ago

Katyanochek1 [597]

I hope this helps you

x=2

f (2)=(2+1)^2=3^2=9

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3 years ago