PLEASE HELP ASAP The Maya developed mathematical systems to chart the passage of time. They invented a method of counting that was based on . Select the best answer from the list below.

a. The stars and planets
b. Hieroglyphics
c. The numeral 20
d. The moon

If you discover that an aggressive driver is following you,you should not? a.drive home or to work b.drive to a crowded location c.flash your lights and honk your horn

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.

Which artificial waterway allows the passageway allows the passage of boats between buffalo and albany ( new york) and, eventually, the atlantic ocean? a. erie canal b. suez canal c. panama canal d. ontario canal