3/5 of the class signed up for classes in math and art. if 1/4 signed up for art, what fraction of the class signed up for math?

What is the least common factor of 6 and 8

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet