There are 20 students on the school's student council. a special homecoming dance committee is to be formed by randomly selecting 6 students from student council. how many possible committees can be formed?

In two fractions have the same denominator but different numerators,which fraction is greater? give an example

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?