Multiply. Simplify by combining like terms.(9a2 + 13b2)(9a2 - 13b2)
A. a4 - 169b4
B. 81a4 - 169b4
C. 81a4 + 234ab - 169b4
D. 81a2 - 234a2b2 - 169b4
Answer: B
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Find the domain of the rational expression.
A. 
B. 
C. All real numbers
D. 
Convert as indicated. Express the answer in decimal form when needed.4.0 miles per week to feet per week
A. 7040 ft/wk B. 586.67 ft/wk C. 21,120 ft/wk D. 1760 ft/wk
Identify any x-intercepts and y-intercepts in the graph respectively.
A. (-5, 0) and (0, 0); (0, -1) B. (-5, 0) and (0, 0); (0, 1) C. (-5, 0) and (1, 0); (0, -1) D. (5, 0) and (1, 0); (0, 1)
Solve the system of equations. If the system is dependent, express solutions in terms of the parameter z. x + y + z = -7 x - y + 2z = -3 4x + y + z = -10
A. (-1, -3.33, -2.67) B. No solution C. (-4, -1, -2) D. (-4, -2, -1)