(a-b)¹²=a¹²-12a¹¹b+...
Let a=2r and b=3s then the second term is -12(2r)¹¹(3s)=-73728r¹¹s.
Answer:
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Step-by-step explanation:
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Answer:
b = 7√3
Step-by-step explanation:
This 30°- 60°- 90° triangle has the proportions:
side opposite of the 30° angle = x
side opposite of the 60° angle = x√3
side opposite of the 90° angle = 2x
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Given the side opposite of the 30° angle which is 7 units long, this can be thought of as x. Knowing the proportions of the other sides, we can find b knowing that this is the side opposite of the 60° angle which is x√3.
Since x = 7, x√3 = 7√3, and therefore
b = 7√3.
solve for the indicated variable means isolate that variable.
Ans(7)
P=IRT (T)
that means solve for T or make T alone on one side of equal.
To do that we just need to move IR on the left side
So we get:

Hence final answer will be 
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Ans(8)
2x-3y=8 (y)
-3y=8-2x

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Ans(9)
V=LWH (L)

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Ans(10)
A=2(L+W) (w)
A=2L+2W
A-2L=2W


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Ans(11)
ax+by=c (y)
by=c-ax

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Ans(12)
(R)
PN=R-C
PN+C=R
R=PN+C