What is the axis of symmetry for f(x) = −3x2 + 12x − 6? a) x = 4 b) x = −4 c) x = 2 d) x = −2

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.