Which expressions are equivalent to 0.5*m*n*4
2(m+n)
0.5m + 4n
none of the above

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !