12k-2+6k
find like terms and put them next to each other
12k+6k-2
combine like terms
18k-2
C
110 % of something is 110/100 = 1.1 times that something
so 110% = 200 * 1.1 = 220 answer
The first one is 4/3
We can solve by,



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The second one is 35.
Idk how to explain...
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The third one is a 6 - gon therefore cannot be C or D.
I'd say the third one is A., it looks like it's caving in.
2/sqrt 5
by rationalising the denominator,
2/sqrt 5 × sqrt 5/sqrt 5
= 2(sqrt 5)/sqrt 5(sqrt 5)
= 2 sqrt 5/5
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hope this helps! :))))