Three boys are in three different rooms. Ernest always tells the truth. Barry sometimes tells the truth. Mario never tells the truth. Use the statements made by the person in each room to tell who is in each of the rooms.
b. Room 1 - Ernest; Room 2 - Mario; Room 3 - Barry
Mathematics
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Simplify the expression.6p2 + 2p3 - 9p2 - 6p3
A. -7p2 B. -3p2 - 4p3 C. -7p2p3 D. 8p2 - 15p3
Mathematics
Use Cramer's rule to solve the system. x + 2y - 3z + w = 7 3x + 4y - z + 2w = 4-2x + y + z - w = -3 x - y + 2z - 2w = 1
A. 
B. 
C. 
D. 
Mathematics
Simplify by combining like terms.
y - 
y
A. 
y
B. 
y
C. 
y
D. 
y
Mathematics
Graph the solution of the system of linear inequalities.
A. 
B. 
C. 
D. 
Mathematics