Before money was invented, how were goods and services exchanged?

Which of these is a role of congress? a) to veto legislation b) to pass the federal budget c) to nominate cabinet members d) to interpret the constitution 2) which of these is a power of the legislative branch? a) declare war b) enforces laws c) interprets laws d) negotiates treaties 3) a two/thirds vote of each house of congress is required to a) impeach the u. s. president. b) approve presidential appointments. c) pass an appropriation or tax bill. d) pass a bill over the president's veto. 4) the chief purpose of congressional committees is to a) draft legislation for consideration by the full congress. b) act as a group to which the president can direct his lobbying effort. c) provide a place for lobbyists and special interest groups to get support. d) hold hearings so that bills can be evaluated and studied prior to voting. 5) after a bill has been passed by both houses of congress it a) becomes a law. b) is sent to the president. c) returns to the house of origin for verification. d) is sent to a subcommittee in the house or senate. 6) house of representatives passes a spending bill → senate debates the spending bill → senate passes the spending bill → ? what completes this sequence of events? a) the spending bill becomes a law b) the states must approve the bill c) the supreme court reviews the bill d) the president must act on the bill eliminate