Write an equivalent expression. Use a commutative law.3 + xy
A. 3 + x + y
B. 3xy, or 3yx
C. xy + 3, or 3 + yx
D. 3(1 + xy)
Answer: C
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Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. closed interval; {x|-3 ? x ? 2}; [-3, 2] B. half-open interval; {x|-3 ? x < 2}; [-3, 2) C. open interval; {x| -3 < x < 2}; (-3, 2) D. half-open interval; {x|-3 < x ? 2}; (-3, 2]
The following system does not have a unique solution. Solve the system.
A. inconsistent system, no solution
B. x = 0, y = -8, z = 0
C. x = - 
, y = 
, z = 1
D. infinitely many solutions of the form x = - 
z, y = -8 - 
z, z = z
Perform the indicated matrix operations.Let A = 
and B = 
. Find 2A + 3B.
A. 
B. 
C. 
D. 
Write the ordered pair corresponding to point I.
A. 
B. 
C. 
D. 
E. 