Rita has 5 friends who are available to go with her to the movies, but she only has 3 extra tickets. How many different choices does Ramona have for which 3 friends to invite?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1