Solve the system of equations by Gauss-Jordan elimination.
A. {(5, 4, 3)}
B. {(3, 5, 4)}
C. {(5, 3, 4)}
D. ?
Answer: A
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Integrate the function f over the given region.f(x, y) = 5x sin xy over the rectangle 0 ? x ? ?, 0 ? y ? 1
A. ?
B. 
C. 5?
D. 5? - 5
Use the standard normal curve table to find the closest z-score for the given condition.4% of the total area is to the right of z.
A. -1.75 B. 1.74 C. 1.76 D. 1.75
Simplify.
2 + 3 ? 1
÷ 18
A. 1
B. 1
C. 
D. 1
Solve.An office manager needs to buy new filing cabinets. Cabinet A takes up 7 square feet of floor space. Cabinet B takes up 4 square feet of floor space. The office has room for no more than 28 square feet of cabinets. Thus, 
where x is the number of A cabinets and y is the number of B cabinets. Does the office have enough floor space for 4 A cabinets and 7 B cabinets?
A. Yes B. No