What is the correct substitution of the values a, b, and c from the equation 0=-3x^2-2x+6

Estimate the product. round the first factor to the nearest whole number, round the second factor to the nearest ten, and then multiply. 3 8/9 × 96

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.