B intersection is the correct answer
The number 36 doesn't belong.
Answer is 18
18 • 7 = 126
126 - 11 = 115
4 • 18 = 72
72 - 7 = 65
115 + 65 = 180
They are supplementary angles, which mean they together equal 180°
Answer: x = 0
Step-by-step explanation:
Take it slow and do one problem at a time. Multiply the first x by the second ( ) and then move on to -3
2x + 9x -3x -27 = -27
combine all like terms
8x - 27 = -27
add 27 to both sides
8x = 0
divide by 8 to get x alone
x = 0
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