How do I figure out x in a quadratic equation?

Winter coats are on sale starting April 1st. A leather coat is on sale for 40% off the regular selling price of $425.99. What is the markdown to the nearest cent?

Elizabeth rode her bike 6 1/2 Miles from her house to the library and then another 2 2/5 miles to her friend Millo's house. If Carson's house is 2 1/2 miles beyond Millo's house, how far would she travel from her house to Carsons house?

What is the value of f (x) 2/3x-11 when x=21

A manufacturer of lighting fixtures has daily production costs of C = 800 - 40x + 0.25x2, where C is the total cost (in dollars) and x is the number of units produced. How many fixtures should be produced each day to yield a minimum cost?

Find B - A if the graph of Ax + By = 7 passes through (2,1) and is parallel to the graph of 2x - 7y = 3.

What angle do the minute and hour hands of a clock make at 8:00

What is the least common multiple of 7 and 8

On a coordinate plane, a straight line with a negative slope, labeled f of x, crosses the y-axis at (0, 4), and the x-axis at (4, 0). Which is true regarding the graphed function f (x) ? f of 0 = 3 f of 5 = negative 1 f of 3 = 2 f of 2 = negative 2

Which of the following is a solution to: x2 + 8x=-12

What is the difference between direct and indirect distribution?