Describe this sequence. 2, 6, 18, 54, ... A. The sequence starts at 2 and adds 4 repeatedly. B. The sequence starts at 54 and divides by 3 repeatedly. C. The sequence starts 2 and multiplies by 3 repeatedly. D. The sequence starts at 6 and adds 12 repeatedly.

thats not a system of equations, that is a solution

i believe it's a.

i'm not sure on this one, most likely correct.

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.