The following technology matrix describes the relationship of certain industries within the economy to each other. (A&F, agriculture and food; RM, raw materials; M, manufacturing; F, fuels industry; U, utilities; SI, service industries) 
How many units of fuels were required to produce 1,000 units of manufactured goods?
Definitions:
Chart of Accounts
A systematic list of all account titles and numbers used by a company, organized to support the recording of transactions.
Trial Balance
A bookkeeping worksheet in which the balances of all ledgers are compiled into debit and credit account columns to verify that the ledger accounts are correctly balanced.
Ledger Balances
The current totals in ledger accounts, reflecting all transactions up to a given point in time.
Trial Balance
An accounting report that lists the balances of all ledgers accounts to verify that total debits equal total credits.
Q6: Set up the system of equations and
Q12: Graph the solution of the system of
Q29: Find the vertex of the graph of
Q62: The number (in millions) of U.S. cellular
Q97: Use the simplex method to find the
Q107: An open-top box is constructed from a
Q120: Suppose a die is biased (unfair) so
Q138: An urn contains two red R balls
Q158: A system of linear equations and a
Q160: Use technology to find the determinant.