Review 1 Chapter 4 Exam1 100 points
Math 140 A. O’Leary
Review exercises p 246 in text: Finite Mathematics Barnett 12th Ed.
Treat this as a practice test
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# 1-2 Solve system of equations by graphing, substitution
# 3 Put matrices in row echelon form (2x2)
# 4 Give dimensions and elements of matrices
# 5 Solve a system of equations (2x2)
# 6-14Use matric +, -, x (2x2)
# 15 Find the inverse of a matrix (2x2)
# 16 solve system of equations by elimination (2x2)
# 19-24
Use matrix +, -, x, (3x3)
# 25 Find the inverse of a matrix (3x3)
+ Sec 4.6 Example 2, 3 Given (or compute) A-1 , write Ax=B
Compute X = A-1 , B
+ Sec 4.6 # 43-48 Solve for X algebraically
+ Sec 4.1 # 61 Given the Cost and Revenue function, find
the break-even point (The number of units, x and P(x))
Profit = Revenue - Cost
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