The perfect squares,1,4,9,16, closed under what?
a: addition
b: multiplication
c: square-rooting
d: none of these

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same

Which is the graph of the following inequality?

10 what is the area of this figure? select from drop down menu