What is the area of the triangle shown below? A. 80 sq. units
B. 18 sq. units
C. 40 sq. units
D. 9 sq. units

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry