Express 247_10 to (a) base 7, (b) base 2, (c) base 8, and (d) base 16.

Multiplying an even number of negative numbers gives an answer that is choose from:

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.

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?