Multiply.
? 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Graph the system of inequalities.x + 2y ? 2 x - y ? 0
A. 
B. 
C. 
D. 
Mathematics
Round as indicated.439 to the nearest hundred
A. 400 B. 300 C. 500 D. 410
Mathematics
Solve the problem.Suppose the sales of a particular brand of appliance satisfy the relationship S(x) = 230x + 5500, where S(x) represents the number of sales in year x, with x = 0 corresponding to 1982. Find the number of sales in 
.
A. 7570 sales B. 7800 sales C. 15,600 sales D. 15,370 sales
Mathematics
?Find bases for the four fundamental subspaces of the matrix 
.
?
A. ??N?(?A)-basis: 
, N(AT)-basis: 
, ?R?(?A)-basis: 
, and R(A?T)-basis: 
B. ?N?(?A)-basis:
, N(AT)-basis: 
, ?R?(?A)-basis: 
, and R(A?T)-basis: 
C. ?N?(?A)-basis:
, N(AT)-basis: 
, ?R?(?A)-basis: 
, and R(A?T)-basis: 
D. ???N?(?A)-basis:
, N(AT)-basis: 
, ?R?(?A)-basis: 
, and R(A?T)-basis: 
?
E. ??N?(?A)-basis:
, N(AT)-basis: 
, ?R?(?A)-basis: 
, and R(A?T)-basis: 
Mathematics