Find the 7th term of the geometric sequence whose common ratio is 2/3 and whose first term is 2

What is the vertex form of f(x) = x2 + 6x + 3

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.