At an ice cream shop, you can get a waffle cone, sugar cone, cake cone or a cup in sizes small, medium and large. there are 20 ice cream flavors and 15 different toppings for the ice cream. how many different ice cream combinations are possible, with one flavor and one topping?

For which rational expression is -2 an excluded value of x?

What are “like terms”? why can we only add like terms?

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?