Decompose 0.42 into tenths and hundredths

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

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

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.