Consider the following Keynesian macroeconomic model: Y=C+I+GC=200+0.8Y
I=1000−2000R
where the endogenous variables are national income (Y), consumption (C) and investment (I) and the exogenous variables are gov't spending (G) and interest rate (R)
i. Write the above equations in a matrix form:
A(Y)=B(C)(I)
where A is a 3 x 3 matrix and B is a 3 x 1 matrix with entries involving the exogenous variables.
ii. Find the inverse of A and solve for Y, C and I.

An attorney came to work on a saturday. when he signed in, he was advised by the morning security guard employed by the building management that he must be out of the building by 5 p.m., when it closes. however, he stayed past 5 p.m. to complete a brief that had to be filed on monday morning. at 5: 15 p.m., the afternoon security guard set the locks on all the doors of the building and left. because she was in a hurry, she did not check the sign-in sheet to make sure that everyone had signed out, contrary to mandatory procedures. when the attorney tried to exit 15 minutes later, he discovered that the doors were all locked and could not be opened from the inside. he used his cell phone to call for , and a supervisor from the building arrived and let him out shortly thereafter. if the attorney sues the building management for false imprisonment, is he likely to win?

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Corporation had a japanese yen receivable resulting from exports to japan and a brazilian real payable resulting from imports from brazil. gracie recorded foreign exchange gains related to both its yen receivable and real payable. did the foreign currencies increase or decrease in dollar value from the date of the transaction to the settlement date?