Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, ml, kg, g, and mg.The book is 21 
long.
A. m
B. cm
C. mm
D. mg
Answer: B
Mathematics
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Find the numerical value of the expression for the given value.
, x = 3
A. - 
B. 
C. - 
D. 
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Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 16
C. 
D. 7
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Write the augmented matrix for the system. 2x + 9y = 43 4y = 12
A. 
B. 
C. 
D. 
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Use the following information to solve the problem. A recreation room is in the shape of an isosceles triangle with the vertex angle measuring 90° and base 4?2 meters.
Find the area of the room.
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Mathematics