Find the discriminant to determine the number of roots, then solve the quadratic equation using the quadratic formula.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

Which table shows a proportional relationship between miles traveled and gas used?