What is the vertex of the parabola?

a. (-1,0)
b. (0,-3)
c. (1,-4)
d. (3,0)

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.