To make a ribbon and bow for a hat stacey needs 5/6 yard of black ribbon and 2/3 yard of red ribbon. how much total ribbon dose she need

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

9is the geometric mean between x and 12

What is the surface area of a cube that has a side length of 8 mm? use the formula is sa=6^2, where sa is the surface area of the cube and s is the length of each side. 48mm^2 96mm^2 384mm^2 2,304mm^2